阅读说明：本技术 一种形状可调节的后戴式眼镜 (Back-wearing glasses with adjustable shape ) 是由 张敏芳 于 2020-12-02 设计创作，主要内容包括：本申请涉及一种形状可调节的后戴式眼镜,属于后戴式眼镜的领域,后戴式眼镜包括两个可拆卸连接的镜框、设置在镜框上的镜片、两个分别固设在两个镜框上的支腿、同时套设在两个支腿上的镜腿；所述镜腿的两端分别与两个支腿滑移连接,所述镜腿与支腿之间设置有用于无极控制调节两者之间距离的调节机构,两个所述镜框之间设置有用于将两者连接的连接机构；所述调节机构包括固设在支腿上的齿条、转动连接在镜腿内的齿轮、固设在齿轮上的套筒、设置在套筒内的转动杆、固设在转动杆远离齿轮一端的旋钮、连接组件、自锁组件、弹性组件。其使眼镜镜腿的长度达到无极调节。(The application relates to a pair of after-wearing glasses with adjustable shapes, which belongs to the field of after-wearing glasses and comprises two detachably connected picture frames, lenses arranged on the picture frames, two support legs fixedly arranged on the two picture frames respectively and glasses legs sleeved on the two support legs simultaneously; two ends of each glasses leg are connected with the two supporting legs in a sliding mode respectively, an adjusting mechanism for adjusting the distance between the glasses legs in an electrodeless control mode is arranged between the glasses legs and the supporting legs, and a connecting mechanism for connecting the glasses frames is arranged between the two glasses frames; the adjusting mechanism comprises a rack fixedly arranged on the supporting leg, a gear rotatably connected in the glasses leg, a sleeve fixedly arranged on the gear, a rotating rod arranged in the sleeve, a knob fixedly arranged at one end of the rotating rod far away from the gear, a connecting assembly, a self-locking assembly and an elastic assembly. The length of the glasses legs of the glasses can be adjusted steplessly.)

1. A shape adjustable behind-the-head mounted eyewear, comprising: comprises two detachably connected picture frames (1), lenses (2) arranged on the picture frames (1), two support legs (3) fixedly arranged on the two picture frames (1) respectively, and mirror legs (4) sleeved on the two support legs (3) simultaneously;

the two ends of each glasses leg (4) are connected with the two supporting legs (3) in a sliding mode respectively, an adjusting mechanism (5) used for adjusting the distance between the glasses legs (4) and the supporting legs (3) in an electrodeless control mode is arranged between the glasses legs (4) and the supporting legs (3), and a connecting mechanism (6) used for connecting the glasses frames (1) is arranged between the glasses frames (1).

2. The shape-adjustable behind-the-head spectacles of claim 1, wherein: the adjusting mechanism (5) comprises a rack (51) fixedly arranged on the supporting leg (3), a gear (52) rotatably connected in the glasses leg (4), a sleeve (53) fixedly arranged on the gear (52), a rotating rod (54) arranged in the sleeve (53), a knob (55) fixedly arranged at one end, far away from the gear (52), of the rotating rod (54), a connecting assembly (56) arranged between the rotating rod (54) and the sleeve (53) and used for connecting the rotating rod (54) and the sleeve (53), a self-locking assembly (57) arranged between the rotating rod (54) and the sleeve (53) and used for preventing the sleeve (53) from rotating, and an elastic assembly (58) arranged between the rotating rod (54) and the gear (52) and used for pushing the rotating rod (54) to move to one side far away from the gear (;

rack (51) set up along the length direction of landing leg (3), mounting groove (41) have been seted up on mirror leg (4), gear (52), sleeve (53) all are located mounting groove (41), gear (52) and rack (51) meshing, knob (55) are located outside mounting groove (41).

3. The shape-adjustable behind-the-head spectacles of claim 2, wherein: the connecting assembly (56) comprises a connecting ring (561) fixedly arranged inside the sleeve (53) and an inserting block (562) sleeved on the rotating rod (54), the inserting block (562) is fixedly connected with the rotating rod (54), the inserting block (562) is in an N-edge shape, an inserting groove (5611) is formed in the connecting ring (561), the inserting groove (5611) is also in an N-edge shape, N is larger than or equal to 3, and the inserting block (562) can be inserted into the inserting groove (5611).

4. The shape-adjustable behind-the-head spectacles of claim 2, wherein: the self-locking assembly (57) comprises a supporting plate (571) fixedly arranged at an opening of the mounting groove (41), a baffle plate (572) fixedly arranged at one end, far away from the gear (52), of the sleeve (53), a first limiting rod (573) arranged between the supporting plate (571) and the baffle plate (572), and a second limiting rod (574) arranged at one end, far away from the supporting plate (571), of the baffle plate (572);

the supporting plate (571) is provided with a first limiting groove (5711) matched with the first limiting rod (573), the first limiting rod (573) can be inserted into the first limiting groove (5711), the second limiting rod (574) is positioned in the sleeve (53), the baffle plate (572) is provided with a second limiting groove (5721) matched with the second limiting rod (574), and the second limiting rod (574) can be inserted into the second limiting groove (5721);

when the first limiting rod (573) is inserted into the first limiting groove (5711), the second limiting rod (574) is synchronously inserted into the second limiting groove (5721).

5. The shape-adjustable behind-the-head spectacles of claim 2, wherein: the elastic component (58) comprises a push plate (581) fixedly arranged at one end, close to the gear (52), of the rotating rod (54) and a spring (582) arranged between the gear (52) and the push plate (581), one end of the spring (582) is abutted against the push plate (581), the other end of the spring is abutted against the gear (52), the spring (582) is always in a compression state, and the push plate (581) can be located in the sleeve (53) to slide.

6. The shape-adjustable behind-the-head spectacles of claim 1, wherein: the connecting mechanism (6) comprises a connecting block (61) fixedly arranged on one of the mirror frames (1), a connecting rod (63) fixedly arranged on the connecting block (61), and a butting block (62) fixedly arranged on the other mirror frame (1);

connecting block (61) and butt piece (62) are located two picture frame (1) one side that is close to each other respectively, connecting hole (621) have been seted up on butt piece (62), connecting rod (63) can peg graft in connecting hole (621), be provided with between connecting block (61) and butt piece (62) and be used for making connecting rod (63) be difficult for anticreep subassembly (64) that breaks away from in connecting hole (621).

7. The shape-adjustable behind-the-head spectacles of claim 6, wherein: the anti-falling component (64) comprises a connecting magnet (641) fixedly arranged on the connecting block (61) and an abutting magnet (642) fixedly arranged on the abutting block (62), and the connecting magnet (641) and the abutting magnet (642) are mutually adsorbed.

8. The shape-adjustable behind-the-head spectacles of claim 6, wherein: and one end of the connecting rod (63) close to the connecting hole (621) is provided with a chamfer (631).

9. The shape-adjustable behind-the-head spectacles of claim 1, wherein: the one end that picture frame (1) was kept away from in landing leg (3) has set firmly first stopper (7), the one end that mirror leg (4) are close to picture frame (1) has set firmly second stopper (8), landing leg (3) run through the one end of second stopper (8) and are located mirror leg (4) internal slipping.

10. A shape adjustable behind-the-head spectacles according to any of claims 1 to 9, wherein: the glasses are characterized in that a dovetail block (9) is fixedly arranged on the supporting leg (3), a dovetail groove (81) matched with the dovetail block (9) is formed in the glasses legs (4), and the dovetail block (9) is located in the dovetail groove (81) and slides.

Technical Field

The present application relates to the field of behind-the-head spectacles, and more particularly, to shape-adjustable behind-the-head spectacles.

Background

The rear-wearing glasses are convenient for users to take, and people can take the glasses off for overlook or eye exercises after wearing the glasses for a long time, and can hang the glasses on the neck, so that the users do not need to look for the glasses everywhere when using the glasses for the next time, and the glasses are convenient to take.

At present, when a user uses the rear-wearing glasses, the glasses legs of the user usually surround the head, and when the user does not need to use the glasses, the user can take off the glasses and hang the glasses on the neck, however, online shopping becomes an important shopping mode in daily life of people, the lengths of the glasses legs are usually fixed, the lengths are difficult to adjust steplessly, the head circumference sizes of every person are different, the user is difficult to purchase the glasses which are suitable for the head type of the user, and the period for replacing the glasses is long.

With respect to the related art in the above, the inventors consider that there is a defect that the length of the temples of the glasses is difficult to adjust without polarity.

Disclosure of Invention

In order to achieve stepless adjustment of the length of the glasses legs, the application provides a shape-adjustable rear-wearing glasses.

The application provides a behind-wearing glasses with adjustable shape adopts following technical scheme:

a pair of shape-adjustable rear-wearing glasses comprises two detachably connected glasses frames, lenses arranged on the glasses frames, two support legs fixedly arranged on the two glasses frames respectively, and glasses legs sleeved on the two support legs simultaneously;

the two ends of each glasses leg are connected with the two supporting legs in a sliding mode respectively, an adjusting mechanism used for adjusting the distance between the glasses legs and the supporting legs in an electrodeless control mode is arranged between the glasses legs and the supporting legs, and a connecting mechanism used for connecting the glasses frames and the glasses frames is arranged between the glasses frames.

By adopting the technical scheme, when a user needs to wear the glasses, the glasses legs are firstly encircled to the head, and then the two glasses frames are connected together through the connecting mechanism, so that the glasses can be worn; if the length of the glasses legs is not enough, firstly, the sleeving length of the glasses legs sleeved on the supporting legs can be adjusted through the adjusting mechanism, the total length of the glasses legs and the supporting legs is adjusted to the required wearing length, and then the two glasses frames are connected together through the connecting mechanism; when a user needs to take off the glasses, the connecting state of the connecting mechanism is released, and then the glasses legs are hung to the neck, so that when the user uses the glasses next time, the user does not need to find the glasses everywhere and hold the glasses, and the glasses are convenient to take and carry; the total length of the supporting legs and the total length of the glasses legs can be adjusted steplessly, and the size of the glasses legs and the sizes of the glasses legs can be adjusted to be most suitable for the user according to the head circumference of different users, so that the user can achieve better use experience, the user does not need to replace the glasses due to size discomfort, and the period from purchasing to wearing of the user in the whole process is shortened.

Optionally, the adjusting mechanism includes a rack fixedly arranged on the support leg, a gear rotatably connected in the glasses leg, a sleeve fixedly arranged on the gear, a rotating rod arranged in the sleeve, a knob fixedly arranged at one end of the rotating rod far away from the gear, a connecting assembly arranged between the rotating rod and the sleeve and used for connecting the rotating rod and the sleeve, a self-locking assembly arranged between the rotating rod and the sleeve and used for preventing the sleeve from rotating, and an elastic assembly arranged between the rotating rod and the gear and used for pushing the rotating rod to move to one side far away from the gear;

the rack is arranged along the length direction of the supporting leg, the glasses legs are provided with mounting grooves, the gear and the sleeve are both positioned in the mounting grooves, the gear is meshed with the rack, and the knob is positioned outside the mounting grooves.

By adopting the technical scheme, when a user adjusts the total lengths of the glasses legs and the supporting legs through the adjusting mechanism, the self-locking state of the self-locking assembly is firstly released, then the rotating rod is connected with the sleeve through the connecting assembly, then the knob is rotated to drive the rotating rod to rotate, the rotating rod drives the sleeve to rotate, the sleeve drives the gear to rotate, and the gear moves relative to the rack, so that the glasses legs are positioned on the supporting legs to slide, the total length between the glasses legs and the supporting legs is further lengthened or shortened, after the user adjusts the total lengths of the glasses legs and the supporting legs to the required length, the rotating rod is separated from the sleeve through the elastic assembly, and the self-locking assembly locks the rotating rod to; under adjustment mechanism's effect, if the user promotes the mirror leg or the mistake bumps the knob, all length change that can not lead to mirror leg and landing leg to the stability of behind-the-head glasses has effectively been improved.

Optionally, the connecting assembly comprises a connecting ring fixedly arranged inside the sleeve and an inserting block sleeved on the rotating rod, the inserting block is fixedly connected with the rotating rod, the inserting block is in an N-edge shape, an inserting groove is formed in the connecting ring, the inserting groove is also in an N-edge shape, N is larger than or equal to 3, and the inserting block can be inserted into the inserting groove.

Through adopting above-mentioned technical scheme, the user passes through coupling assembling when dwang and muffjoint, at first will press the knob downwards, the knob drives the dwang and moves down, the dwang drives the grafting piece downstream, thereby to plug in the grafting piece to the inserting groove, N is greater than or equal to 3 and can guarantees that the dwang rotates the time, the dwang drives the grafting piece and rotates with the go-between is synchronous, and the grafting piece can not rotate around the go-between, the go-between rotates and can drive the sleeve and rotate, thereby realize with sleeve fixed connection's gear revolve.

Optionally, the self-locking assembly comprises a supporting plate fixedly arranged at an opening of the mounting groove, a baffle fixedly arranged at one end of the sleeve far away from the gear, a first limiting rod arranged between the supporting plate and the baffle, and a second limiting rod arranged at one end of the baffle far away from the supporting plate;

the supporting plate is provided with a first limiting groove matched with the first limiting rod, the first limiting rod can be inserted into the first limiting groove, the second limiting rod is positioned in the sleeve, the baffle is provided with a second limiting groove matched with the second limiting rod, and the second limiting rod can be inserted into the second limiting groove;

when the first limiting rod is inserted into the first limiting groove, the second limiting rod is synchronously inserted into the second limiting groove.

By adopting the technical scheme, when a user locks the rotating rod through the self-locking assembly, firstly, the user rotates the knob, after the first limiting rod is aligned with the first limiting groove, the second limiting rod is synchronously aligned with the second limiting groove, under the action of the elastic assembly, the first limiting rod is inserted into the first limiting groove, and the second limiting rod is synchronously inserted into the second limiting groove; if the knob is bumped to the user mistake, first gag lever post is pegged graft at first spacing inslot, makes the dwang can not rotate to the total length of mirror leg and landing leg does not change, if the user promotes the mirror leg, the second gag lever post is pegged graft at the second spacing inslot, makes the sleeve can not rotate, thereby the gear can not rotate, and then gear and rack can not take place relative movement, and the total length of mirror leg and landing leg also can not change, thereby effectively improved adjustment mechanism's stability.

Optionally, the elastic component including set firmly push pedal, the spring of setting between gear and push pedal that the dwang is close to the one end of gear, spring one end and push pedal butt, the other end and gear butt, the spring is in compression state all the time, the push pedal can be located the sleeve and slided.

Through adopting above-mentioned technical scheme, the user finishes the total length regulation between mirror leg and the landing leg after, loosens the knob, and the spring promotes the push pedal under the spring action and removes to the one side of keeping away from the gear, and the push pedal promotes the dwang simultaneously and removes to the one side of keeping away from the gear to release coupling assembling's connected state.

Optionally, the connecting mechanism includes a connecting block fixed on one of the lens frames, a connecting rod fixed on the connecting block, and a butting block fixed on the other lens frame;

the connecting block and the butt block are respectively located on one side where the two mirror frames are close to each other, a connecting hole is formed in the butt block, the connecting rod can be inserted into the connecting hole, and an anti-falling assembly used for enabling the connecting rod to be difficult to separate from the connecting hole is arranged between the connecting block and the butt block.

By adopting the technical scheme, when a user needs to connect the two mirror frames through the connecting mechanism, the connecting rod is firstly inserted into the connecting hole, and then the connecting block is connected with the butting block through the anti-falling assembly, so that the connecting rod is not easy to separate from the connecting hole, and finally the two mirror frames are connected; a user needs to take off the glasses, firstly, the connection state of the anti-falling component is released, and then the connecting rod is pulled out from the connecting hole, so that the two glasses frames can be separated; the connecting mechanism is convenient for a user to wear and take off the glasses, thereby improving the use experience of the user.

Optionally, the anticreep subassembly includes the connection magnet who sets firmly on the connecting block, sets firmly the butt magnet on the butt piece, connection magnet and butt magnet adsorb each other.

By adopting the technical scheme, when a user drags the two mirror frames to two sides, the connecting magnet fixedly arranged on the connecting block is separated from the abutting magnet fixedly arranged on the abutting block, so that the connecting state of the anti-falling assembly is released; the user pegs graft the connecting rod to the connecting hole in the back, and connecting magnet adsorbs each other with butt magnet, makes the connecting rod be difficult for deviating from in the connecting hole to coupling mechanism's stability has been improved.

Optionally, a chamfer is formed at one end, close to the connecting hole, of the connecting rod.

Through adopting above-mentioned technical scheme, the chamfer plays the effect of direction and location for the connecting rod inserts in the connecting hole, and the person of facilitating the use inserts the connecting rod in the connecting hole.

Optionally, the one end that the picture frame was kept away from to the landing leg has set firmly first stopper, the one end that the mirror leg is close to the picture frame has set firmly the second stopper, the landing leg runs through the second stopper, the one end that the landing leg runs through the second stopper is located the mirror leg and slides.

Through adopting above-mentioned technical scheme, when the user passes through the length between adjustment mechanism regulation mirror leg and the landing leg, behind first stopper and second stopper butt, the mirror leg can not continue to remove to the one side of keeping away from the picture frame to prevent that the mirror leg from droing from the landing leg, and lead to the inconvenient problem of follow-up mirror leg and landing leg installation.

Optionally, a dovetail block is fixedly arranged on the supporting leg, a dovetail groove matched with the dovetail block is formed in the glasses leg, and the dovetail block is located in the dovetail groove and slides.

Through adopting above-mentioned technical scheme, the forked tail piece can only slide along seting up the direction of dovetail to realized the motion of sliding of mirror leg, and played direction and spacing effect to the sliding of mirror leg.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the total length of the supporting legs and the total length of the glasses legs can be adjusted steplessly, and the supporting legs and the glasses legs can be adjusted to the size which is most suitable for the user according to the head circumference of different users, so that the user can achieve better use experience, the user does not need to replace the glasses due to size discomfort, and the period of the user from purchasing to wearing the whole process is shortened;

2. under the action of the adjusting mechanism, if a user pushes the glasses legs or mistakenly touches the knobs, the total length of the glasses legs and the legs cannot be changed, and therefore the stability of the rear-wearing glasses is effectively improved;

3. the connecting mechanism is convenient for a user to wear and take off the glasses, thereby improving the use experience of the user.

Drawings

Fig. 1 is a schematic structural view of rear-wear spectacles according to an embodiment of the present application;

fig. 2 is a partially enlarged schematic view showing a portion a of fig. 1;

FIG. 3 is a partial cross-sectional view showing an adjustment mechanism;

FIG. 4 is a partial cross-sectional view showing the adjustment mechanism in an adjustment state taken along line A-A of FIG. 2;

FIG. 5 is a partial cross-sectional view showing the adjustment mechanism in a self-locking condition;

FIG. 6 is a partial schematic view showing the connection mechanism in a connected state;

FIG. 7 is an exploded view of the connection mechanism;

fig. 8 is a partial sectional view showing the connection mechanism.

Description of reference numerals: 1. a mirror frame; 2. a lens; 3. a support leg; 4. a temple; 41. mounting grooves; 5. an adjustment mechanism; 51. a rack; 52. a gear; 53. a sleeve; 54. rotating the rod; 55. a knob; 56. a connecting assembly; 561. a connecting ring; 5611. inserting grooves; 562. an insertion block; 57. a self-locking assembly; 571. a support plate; 5711. a first limit groove; 572. a baffle plate; 5721. a second limit groove; 573. a first limit rod; 574. a second limiting rod; 58. an elastic component; 581. pushing the plate; 582. a spring; 6. a connecting mechanism; 61. connecting blocks; 62. a butting block; 621. connecting holes; 63. a connecting rod; 631. chamfering; 64. an anti-drop component; 641. connecting a magnet; 642. abutting against the magnet; 7. a first stopper; 8. a second limiting block; 81. a dovetail groove; 9. a dovetail block.

Detailed Description

The present application is described in further detail below with reference to figures 1-8.

The embodiment of the application discloses behind-wearing glasses with adjustable shape. Referring to fig. 1 and 2, the rear-wearing glasses comprise two detachably connected glasses frames 1, wherein lenses 2 are arranged on the glasses frames 1, and supporting legs 3 are fixedly arranged on the sides, far away from each other, of the two glasses frames 1; a glasses leg 4 is arranged between the two supporting legs 3, two ends of the glasses leg 4 are respectively sleeved at one ends of the two supporting legs 3 far away from the glasses frame 1, and two ends of the glasses leg 4 are respectively connected with the two supporting legs 3 in a sliding manner; an adjusting mechanism 5 is arranged between the glasses legs 4 and the supporting legs 3, and the adjusting mechanism 5 can steplessly control and adjust the distance between the glasses legs 4 and the supporting legs; a connecting mechanism 6 is arranged between the two lens frames 1, and the connecting mechanism 6 is used for connecting the two lens frames 1.

When a user needs to wear the glasses, the glasses legs 4 are firstly wound around the head, and then the two glasses frames 1 are connected through the connecting mechanism 6, so that the glasses can be worn; if the total length of the supporting legs 3 and the glasses legs 4 is longer or shorter, when a user is uncomfortable to wear, firstly, the length of the glasses legs 4 sleeved on the supporting legs 3 can be adjusted through the adjusting mechanism 5, so that the total length of the glasses legs 4 and the supporting legs 3 is controlled, the total length of the glasses legs 4 and the supporting legs 3 is adjusted to the required wearing length, and then the two glasses frames 1 are connected together through the connecting mechanism 6; when the user need take off glasses, at first remove coupling mechanism 6's connected state, separate both picture frames 1 afterwards to hang mirror leg 4 to the neck, when treating next use, the user need not to look for glasses everywhere, also need not handheld glasses, thereby the person of facilitating the use takes and portable.

Referring to fig. 3 and 4, the adjusting mechanism 5 includes a rack 51 fixedly arranged on the supporting leg 3, the rack 51 is arranged along the length direction of the supporting leg 3, the temple 4 is provided with an installation groove 41, the installation groove 41 is cylindrical, the axis of the installation groove 41 is perpendicular to the supporting leg 3, the temple 4 is rotatably connected with a gear 52, the gear 52 is positioned in the installation groove 41, the rack 51 penetrates through the installation groove 41, and the gear 52 is meshed with the rack 51; a sleeve 53 is fixedly arranged above the gear 52, and the axis of the sleeve 53 is collinear with the axis of the gear 52; a rotating rod 54 is arranged in the sleeve 53, the rotating rod 54 can be positioned in the sleeve 53 to slide and rotate, a knob 55 is fixedly arranged at one end of the rotating rod 54, which is far away from the gear 52, the knob 55 is positioned outside the mounting groove 41, and the knob 55 is used for providing a hand-held part for a user, so that the rotating rod 54 can be conveniently rotated by the user; a connecting assembly 56 is arranged between the rotating rod 54 and the sleeve 53, and the connecting assembly 56 is used for connecting the rotating rod 54 and the sleeve 53; a self-locking assembly 57 is arranged between the rotating rod 54 and the sleeve 53, and the self-locking assembly 57 is used for preventing the sleeve 53 from rotating; an elastic component 58 is arranged between the rotating rod 54 and the gear 52, and the elastic component 58 is used for pushing the rotating rod 54 to move towards the side far away from the gear 52.

Referring to fig. 4 and 5, the connecting assembly 56 includes a connecting ring 561 fixedly disposed on the inner wall of the sleeve 53, the outer side of the connecting ring 561 is circular, the axis of the connecting ring 561 is collinear with the sleeve 53, an insertion block 562 is sleeved on the rotating rod 54, the cross section of the insertion block 562 is hexagonal, the insertion block 562 is fixedly connected with the rotating rod 54, an insertion groove 5611 is disposed on the inner side of the connecting ring 561, the cross section of the insertion groove 5611 is also hexagonal, and the insertion block 562 is inserted into the insertion groove 5611.

Referring to fig. 4 and 5, the self-locking assembly 57 includes a supporting plate 571 fixed at the opening of the mounting groove 41, the supporting plate 571 is circular, the axis of the supporting plate 571 is collinear with the axis of the mounting groove 41, and the rotating rod 54 penetrates through the supporting plate 571; a baffle 572 is fixedly arranged at one end of the sleeve 53, which is far away from the gear 52, the baffle 572 is also circular, the axis of the baffle 572 is collinear with the axis of the sleeve 53, and the rotating rod 54 penetrates through the baffle 572; a plurality of first limiting rods 573 are arranged between the supporting plate 571 and the baffle plate 572, the first limiting rods 573 are fixedly connected with the rotating rod 54, the plurality of first limiting rods 573 are arranged along the radial direction of the rotating rod 54, the plurality of first limiting rods 573 are arranged on the same circumferential surface, the plurality of first limiting rods 573 are uniformly distributed at intervals along the rotating circumferential direction, a first limiting groove 5711 matched with the first limiting rods 573 is formed in the supporting plate 571, and the first limiting rods 573 can be inserted into the first limiting groove 5711; a plurality of second limiting rods 574 are arranged on one side, away from the supporting plate 571, of the baffle plate 572, the second limiting rods 574 are fixedly connected with the rotating rod 54, the second limiting rods 574 are located in the sleeves 53, the shapes and the distributions of the plurality of second limiting rods 574 and the plurality of first limiting rods 573 are the same, a second limiting groove 5721 matched with the second limiting rods 574 is formed in the supporting plate 571, and the second limiting rods 574 can be inserted into the second limiting grooves 5721; when the first limiting rod 573 is inserted into the first limiting groove 5711, the second limiting rod 574 is inserted into the second limiting groove 5721.

Referring to fig. 4 and 5, the elastic component 58 includes a push plate 581 fixed at one end of the rotating rod 54 near the gear 52, the push plate 581 is circular, the axis of the push plate 581 is collinear with the axis of the sleeve 53, and the push plate 581 can slide in the sleeve 53; a spring 582 is provided between the gear 52 and the push plate 581, and one end of the spring 582 abuts against the push plate 581, and the other end abuts against the gear 52, and the spring 582 is always in a compressed state.

When the user adjusts the total length of mirror leg 4 and landing leg 3 through adjustment mechanism 5, at first overcome the resistance of spring 582 and press down knob 55, knob 55 drives dwang 54 and moves down, and dwang 54 drives first gag lever post 573 and breaks away from first spacing groove 5711, and dwang 54 drives second gag lever post 574 simultaneously and breaks away from second spacing groove 5721 to remove the auto-lock state of auto-lock subassembly 57.

Subsequently, the rotating rod 54 drives the plug-in block 562 to move downwards, the plug-in block 562 is plugged into the plug-in groove 5611 on the connecting ring 561, then, the knob 55 is rotated by a user, the rotating rod 54 can be driven to rotate by the knob 55, the rotating rod 54 drives the plug-in block 562 to rotate, the plug-in block 562 drives the connecting ring 561 to rotate, the connecting ring 561 rotates to drive the sleeve 53 to rotate, the gear 52 fixedly connected with the sleeve 53 rotates, the gear 52 moves relative to the rack 51, the glasses legs 4 are located on the supporting legs 3 to slide, and therefore the total length between the glasses legs 4 and the supporting legs 3 is lengthened or shortened.

After the user adjusts the total length between the temple 4 and the leg 3 to a desired length, the knob 55 is loosened, the spring 582 pushes the push plate 581 to move to a side away from the gear 52 under the action of elastic force, meanwhile, the push plate 581 pushes the rotating rod 54 to move to a side away from the gear 52, thereby releasing the connection state of the connecting assembly 56, then, the user rotates the knob 55, the knob 55 drives the rotating rod 54 to rotate, after the rotating rod 54 aligns the first limiting rod 573 with the first limiting groove 5711, the second limiting rod 574 is synchronously aligned with the second limiting groove 5721, then, the knob 55 is loosened, under the action of elastic potential energy of the spring 582, the first limiting rod 573 is inserted into the first limiting groove 5711, and the second limiting rod 574 is inserted into the second limiting groove 5721, thereby completing the self-locking of the gear 52 and the rack 51.

If the user bumps knob 55 by mistake, first gag lever post 573 is pegged graft in first spacing groove 5711, makes dwang 54 can not rotate to the total length of mirror leg 4 and landing leg 3 can not change, if the user promotes mirror leg 4, second gag lever post 574 is pegged graft in second spacing groove 5721, makes sleeve 53 can not rotate, thereby gear 52 can not rotate, and then gear 52 and rack 51 can not take place relative movement, and mirror leg 4 can not change with the total length of landing leg 3 yet.

Referring to fig. 3, a first limiting block 7 is fixedly arranged at one end of the supporting leg 3, which is far away from the mirror frame 1, the first limiting block 7 is rectangular, a second limiting block 8 is fixedly arranged at one end of the mirror leg 4, which is close to the mirror frame 1, and the second limiting block 8 is also rectangular; the supporting legs 3 and the racks 51 penetrate through the second limiting block 8, and one ends of the supporting legs 3 penetrating through the second limiting block 8 are located in the glasses legs 4 to slide; the upper and lower both sides of landing leg 3 all set firmly dovetail block 9, offer on the second stopper 8 with the dovetail 81 of 9 looks adaptations of dovetail block, dovetail block 9 is located dovetail 81 internal slipping, dovetail block 9 is used for playing direction and spacing effect to sliding of mirror leg 4.

When the user passes through adjustment mechanism 5 and adjusts the length between mirror leg 4 and the landing leg 3, first stopper 7 is located mirror leg 4 and slides, and dovetail block 9 can only follow second stopper 8 and go up the orientation of seting up of dovetail 81 and slide simultaneously, and after first stopper 7 and the 8 butt of second stopper, mirror leg 4 can not continue to remove to the one side of keeping away from picture frame 1 to prevent that mirror leg 4 from droing from landing leg 3.

Referring to fig. 6 and 7, the connecting mechanism 6 includes a connecting block 61 fixed on one of the lens frames 1 and a butting block 62 fixed on the other lens frame 1, the connecting block 61 and the butting block 62 are rectangular, and the connecting block 61 and the butting block 62 are respectively located on one side of the two lens frames 1 close to each other; a connecting rod 63 is fixedly arranged on one side of the connecting block 61, which is far away from the mirror frame 1 fixedly connected with the connecting block, a connecting hole 621 matched with the connecting rod 63 is formed in the abutting block 62, and the connecting rod 63 can be inserted into the connecting hole 621; one end of the connecting rod 63, which is close to the connecting hole 621, is provided with a chamfer 631, and the chamfer 631 plays a role in guiding and positioning when the connecting rod 63 is inserted into the connecting hole 621, so that a user can conveniently insert the connecting rod 63 into the connecting hole 621; an anti-dropping assembly 64 is arranged between the connecting block 61 and the abutting block 62, and the anti-dropping assembly 64 is used for preventing the connecting rod 63 from being separated from the connecting hole 621.

Referring to fig. 7 and 8, the anti-slip assembly 64 includes a connecting magnet 641 fixedly disposed on one side of the connecting block 61 close to the abutting block 62, wherein the connecting magnet 641 is a cylinder; an abutting magnet 642 is fixedly arranged on one side, close to the connecting block 61, of the abutting block 62, and the abutting magnet 642 is also cylindrical; the connecting magnet 641 and the contact magnet 642 attract each other.

When a user needs to connect the two glasses frames 1 through the connecting mechanism 6, the connecting rod 63 is inserted into the connecting hole 621 through the chamfer 631, and then the connecting magnet 641 and the abutting magnet 642 are mutually attracted, so that the connecting rod 63 is not easy to be separated from the connecting hole 621, and the two glasses frames 1 are connected; the user needs to take off the glasses, and first drags the two glasses frames 1 to both sides at the same time, so that the connecting magnet 641 is separated from the abutting magnet 642, thereby releasing the connection state of the anti-falling assembly 64, and then pulls the connecting rod 63 out of the connecting hole 621, so that the two glasses frames 1 are separated, and the glasses are hung on the neck.

The implementation principle of the shape-adjustable behind-the-head glasses of the embodiment of the application is as follows: when a user needs to wear the glasses, the glasses legs 4 are firstly encircled to the head, then the connecting rods 63 are inserted into the connecting holes 621 and connected with the abutting magnets 642 through the connecting magnets 641, and then the two glasses frames 1 can be connected together to complete wearing of the glasses; if the total length of the glasses legs 4 and the supporting legs 3 is insufficient, firstly, the knob 55 is pressed downwards and rotated, the plug-in block 562 is plugged into the plug-in groove 5611, then the knob 55 is rotated, the knob 55 drives the rotating rod 54 to rotate, the rotating rod 54 drives the sleeve 53 to rotate, the sleeve 53 drives the gear 52 to rotate, the sleeved length of the glasses legs 4 sleeved on the supporting legs 3 is adjusted under the action of the gear 52 and the rack 51, the total length of the glasses legs 4 and the supporting legs 3 is adjusted to the required wearing length, and then the two glasses frames 1 are connected together through the connecting mechanism 6; when a user needs to take off the glasses, the two glasses frames 1 are firstly dragged towards two sides at the same time, so that the connecting magnet 641 is separated from the abutting magnet 642, the connecting rod 63 is separated from the connecting hole 621, and then the glasses legs 4 are hung to the neck; the total length of the supporting legs 3 and the glasses legs 4 can be adjusted steplessly, and the size of the glasses can be adjusted to be most suitable for the user according to the head circumference of different users, so that the user can achieve better use experience, the user does not need to replace the glasses due to size discomfort, and the period from purchasing to wearing of the user is shortened.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.