阅读说明：本技术 一种连杆传动的锁舌装置 (Connecting rod driven lock tongue device ) 是由 沈汉标 王妙玉 童威云 黄安川 黄克洲 夏亮 于 2019-11-11 设计创作，主要内容包括：本发明公开了一种连杆传动的锁舌装置,应用在锁壳内,包括：锁舌,对应穿过设在所述锁壳上的锁孔以实现弹出所述锁壳外或收回所述锁壳内；连接滑片,设在所述锁壳内,所述连接滑片与所述锁舌的端部相连,所述连接滑片与所述锁壳相对滑动；连杆,设在所述锁壳内,所述连杆的一端与所述连接滑片销连接；钮旋件,设在所述锁壳内,并位于所述连接滑片的移动路径的延长线上；所述钮旋件设有连接部,所述钮旋件通过其连接部与所述连杆销连接。本发明可减小用于带动锁舌弹出或收回锁体内的锁舌装置的体积,提高锁体内的空间利用率。(The invention discloses a connecting rod driven bolt device, which is applied in a lock shell and comprises: the lock bolt correspondingly penetrates through a lock hole formed in the lock shell to be ejected out of the lock shell or retracted into the lock shell; the connecting sliding sheet is arranged in the lock shell, connected with the end part of the bolt and relatively slides with the lock shell; the connecting rod is arranged in the lock shell, and one end of the connecting rod is connected with the connecting sliding sheet pin; the button rotating piece is arranged in the lock shell and is positioned on an extension line of a moving path of the connecting sliding piece; the knob is provided with a connecting part, and the knob is connected with the connecting rod pin through the connecting part. The invention can reduce the volume of the spring bolt device for driving the spring bolt to pop out or withdraw in the lock body and improve the space utilization rate in the lock body.)

1. The utility model provides a connecting rod driven spring bolt device, uses in the lock shell, its characterized in that includes:

the lock bolt correspondingly penetrates through a lock hole formed in the lock shell to be ejected out of the lock shell or retracted into the lock shell;

the connecting sliding sheet is arranged in the lock shell, connected with the end part of the bolt and relatively slides with the lock shell;

the connecting rod is arranged in the lock shell, and one end of the connecting rod is connected with the connecting sliding sheet pin;

the button rotating piece is arranged in the lock shell and is positioned on an extension line of a moving path of the connecting sliding piece; the knob is provided with a connecting part, and the knob is connected with the connecting rod pin through the connecting part.

2. The link-driven latch bolt assembly of claim 1, wherein when the latch bolt is fully ejected from the housing, a gap is formed between the knob and the connecting slide for sliding the connecting slide, the width of the gap between the knob and the connecting slide is equal to the maximum sliding distance of the connecting slide, and the maximum sliding distance of the connecting slide is equal to the length of the latch bolt exposed from the housing when the latch bolt is fully ejected from the housing.

3. The link-driven deadbolt assembly of claim 1, wherein the link is configured in a curved configuration with a curved opening toward a side of the housing, and wherein the pin connection of the link to the connecting slide is located off a horizontal centerline of the connecting slide on a side of the housing.

4. The link-driven deadbolt assembly of claim 1, wherein when the deadbolt is fully ejected out of the deadbolt housing, the pin connection of the link to the connection section is closer to the side of the housing than the pin connection of the link to the connection slide.

5. The link-driven deadbolt assembly of claim 4, wherein when the deadbolt is fully retracted into the housing, the connection portion is perpendicular to the side of the housing and the pinned connection of the link to the connection slide is closer to the side of the housing than the pinned connection of the link to the connection portion.

6. The connecting rod driven bolt assembly of claim 1, wherein the button element further comprises a support portion, and when the support portion is supported by the side edge of the lock housing, the connecting portion is parallel to the side edge of the lock housing, and the distance from the outermost end of the connecting portion to the front panel of the lock housing is minimized, so that the bolt is completely ejected out of the lock housing.

7. The linkage driven deadbolt assembly of claim 6, wherein a torsion spring is disposed within the housing, one end of the torsion spring resting on a stud of the housing and the other end of the torsion spring being connected to the retaining portion.

8. The connecting rod driven bolt device according to claim 1, wherein a bar-shaped hole is formed in one side of the connecting slip sheet close to the lock case, which is located outside the horizontal centerline, the bar-shaped hole is parallel to the side edge of the lock case, a limiting rod is arranged on the lock case, the limiting rod is limited in the bar-shaped hole, and the connecting slip sheet slides back and forth along the limiting rod through the bar-shaped hole.

9. The link-driven deadbolt assembly of claim 1, wherein a notch is provided in an edge of the side of the connecting slide that is away from the housing outside the horizontal centerline, the notch extending from the outside edge of the connecting slide to the horizontal centerline of the connecting slide.

10. The link-driven deadbolt assembly of claim 9, wherein a shortest distance from a pin connection of the link to the connecting slide to an oblique edge of the notch is the same as a shortest distance from the pin connection to a front side of the connecting slide for connecting to the end of the deadbolt.

Technical Field

The invention relates to the field of lock body structures, in particular to a connecting rod driven lock tongue device.

Background

Because the intelligent degree of the existing lock body is higher and higher, and the linkage structure in the lock body is more and more complex, when the inner structure of the lock body is designed, how to realize the mutual matching linkage of all parts in the lock body is needed to be considered, how to fully utilize the limited space in the lock body is needed to be considered, and how to improve the space utilization rate is also the key and difficult point of designers.

The lock bolt can be driven by the lock bolt device to repeatedly pop out or retract into the lock body, so that the action of locking or unlocking the door is realized. The existing lock bolt device generally adopts a structure as shown in fig. 1, a connecting sheet is connected to the end part of the lock bolt, a shifting hole is formed in one side of the connecting sheet, a knob is arranged on one side of the connecting sheet corresponding to the shifting hole, the shifting sheet of the knob is correspondingly inserted into the shifting hole, and when a key or a handle is utilized to drive the knob to rotate, the knob can shift the connecting sheet to move forwards or backwards, so that the lock bolt is popped out or retracted into the lock body.

However, the area of the connecting sheet in the existing bolt device is too large, and the knob is located at one side of the connecting sheet to enable the gap between the knob and the side edge of the lock body to be too large, more space in the lock body is occupied, and because the gap position is located at a position close to the side edge of the lock body, other parts cannot be installed in the gap again, the space area which cannot be utilized in the lock body is increased, the installation space of a motor or other linkage parts is reduced, the space utilization rate in the lock body is low, the size of the lock body cannot be reduced, or the integration degree of the lock body cannot be improved.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a connecting rod driven bolt device, which reduces the volume of the bolt device for driving a bolt to pop out or retract into a lock body and improves the space utilization rate in the lock body.

The purpose of the invention is realized by adopting the following technical scheme:

a connecting rod driven bolt device applied in a lock shell comprises:

the lock bolt correspondingly penetrates through a lock hole formed in the lock shell to be ejected out of the lock shell or retracted into the lock shell;

the connecting sliding sheet is arranged in the lock shell, connected with the end part of the bolt and relatively slides with the lock shell;

the connecting rod is arranged in the lock shell, and one end of the connecting rod is connected with the connecting sliding sheet pin;

the button rotating piece is arranged in the lock shell and is positioned on an extension line of a moving path of the connecting sliding piece; the knob is provided with a connecting part, and the knob is connected with the connecting rod pin through the connecting part.

Furthermore, when the lock tongue is completely ejected out of the lock shell, a gap for the connection sliding piece to slide is formed between the knob and the connection sliding piece, the width of the gap between the knob and the connection sliding piece is equal to the maximum sliding distance of the connection sliding piece, and the maximum sliding distance of the connection sliding piece is equal to the length of the lock tongue exposed outside the lock shell when the lock tongue is completely ejected out of the lock shell.

Furthermore, the connecting rod is of a bent structure, a bent opening of the connecting rod faces towards the side edge of the lock shell, and a pin connecting position of the connecting rod and the connecting sliding piece is located on one side, close to the lock shell, of the connecting sliding piece outside a horizontal centerline.

Further, when the bolt is completely ejected out of the bolt lock case, relative to the pin joint of the connecting rod and the connecting sliding piece, the pin joint of the connecting rod and the connecting part is closer to the side edge of the lock case.

Further, when the bolt is completely retracted into the lock shell, the connecting portion is perpendicular to the side edge of the lock shell, and the pin connection position of the connecting rod and the connecting sliding piece is closer to the side edge of the lock shell relative to the pin connection position of the connecting rod and the connecting portion.

Furthermore, the button rotating piece is also provided with a supporting part, when the supporting part is supported on the side edge of the lock shell, the connecting part is parallel to the side edge of the lock shell, and the distance from the outermost end of the connecting part to the front panel of the lock shell is minimum, so that the spring bolt is completely ejected out of the lock shell.

Furthermore, a torsion spring is arranged in the lock shell, one end of the torsion spring is stopped on the lock shell, and the other end of the torsion spring is connected with the abutting part.

Furthermore, the horizontal centerline of connecting the gleitbretter is close to outward one side of lock shell is equipped with the bar hole, the bar hole with the side of lock shell is parallel to each other, be equipped with the gag lever post on the lock shell, the gag lever post is spacing in the bar is downthehole, connect the gleitbretter by the bar hole along the gag lever post comes and goes to slide.

Furthermore, a notch is arranged at the edge of one side, far away from the lock shell, of the horizontal middle line of the connecting sliding piece, and the notch extends to the horizontal middle line of the connecting sliding piece from the outer side edge of the connecting sliding piece.

Furthermore, the shortest distance from the pin joint of the connecting rod and the connecting slide piece to the inclined edge of the notch is the same as the shortest distance from the pin joint to the front side edge of the connecting slide piece, which is used for connecting the end part of the lock tongue.

Compared with the prior art, the invention has the beneficial effects that:

the connecting slip sheet is connected with the knob through the connecting rod, the knob is arranged on an extension line of a moving path of the connecting slip sheet, the spring bolt is ejected out or retracted into the lock shell, the whole volume of the spring bolt device can be greatly reduced, the spring bolt device is prevented from occupying too much space in the lock body, the installation and linkage of other parts are influenced, and therefore the space utilization rate in the lock body is improved.

Drawings

FIG. 1 is a schematic structural diagram of the background art of the present invention;

FIG. 2 is a schematic view of the latch device of the present invention (when the latch is fully ejected out of the housing);

FIG. 3 is a partial enlarged view of a portion a of FIG. 2;

FIG. 4 is a schematic perspective view of the latch device of the present invention (with the latch fully ejected from the housing);

FIG. 5 is a schematic view of the deadbolt assembly of the present invention (with the deadbolt fully retracted within the housing);

FIG. 6 is a partial enlarged view of portion b of FIG. 5;

fig. 7 is a perspective view of the deadbolt assembly of the present invention (with the deadbolt fully retracted within the housing).

In the figure: 1. a lock case; 101. a front panel; 102. a side edge; 2. a latch bolt; 3. connecting sheets; 4. poking holes; 5. shifting blocks; 6. a knob; 601. a key hole; 602. a connecting portion; 603. a holding portion; 7. a torsion spring; 8. a connecting rod; 9. connecting the sliding sheet; 901. a notch; 902. a strip-shaped hole; 903. a limiting rod.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.

The current conventional spring bolt device is as shown in figure 1, the connection piece 3 links to each other with the tip of spring bolt 2, but connection piece 3 and lock shell 1 mutual slip, and seted up on one side of connection piece 3 and dialled hole 4, the outstanding shifting block 5 of button rotating member 6 inserts and dials in the hole 4, rotating button rotating member 6 and can stirring connection piece 3 after button rotating member 6 corresponds to insert suitable key or knob shifting piece, the direction of rotation of button rotating member 6 is direct influence the moving direction of connection piece 3, thereby realize spring bolt 2 and pop out or retract in the lock shell 1.

If the knob element 6 is arranged in the position shown in fig. 1, a large gap exists between the connecting piece 3 and the lock case 1, and the gap cannot be utilized, so that the whole bolt device occupies a large space volume of the lock case 1; if the knob 6 is disposed near the bottom of the connecting plate 3, the moving distance of the connecting plate 3 is reduced, which may cause the knob 6 not to rotate normally or the bolt 2 not to retract into the lock case 1 completely; if the width of the lock shell 1 is increased, the overall size of the lock shell 1 is increased, the production and manufacturing cost is increased, and the popularization and the sale of the lock body are not facilitated.

The embodiment provides a bolt device driven by a connecting rod 8, which is applied to an electronic lock body or a mechanical lock body, occupies a smaller space in a lock shell 1, and improves the utilization rate of the inner space of the lock shell 1.

As shown in fig. 2 to 7, the lock body includes a lock case 1, and a front panel 101 of the lock case 1 is provided with lock holes, where the lock holes are used to accommodate bolts 2, one lock hole corresponds to one bolt 2, and the bolt 2 correspondingly passes through the lock hole to be ejected out of the lock case 1 or retracted into the lock case 1.

The lock tongue 2 can be arranged into a square tongue, an oblique tongue or a safety tongue and other lock tongue 2 structures, the lock tongue 2 structures can realize the door locking action when being popped out of the lock hole, and the door opening action can be carried out when being retracted into the lock hole. The bolt 2 may be disposed at two side ends or a middle position of the front panel 101 of the lock case 1, and the position of the bolt 2 may be adjusted according to actual conditions, and in this embodiment, the bolt 2 and the corresponding bolt device are distributed at one side end of the front panel 101 of the lock case 1, that is, the bolt 2 and the bolt device are disposed at positions close to the side edge 102 of the lock case 1, so that the position of the edge of the lock case 1 may be fully utilized.

The tip of spring bolt 2 with connect gleitbretter 9 fixed connection, connect gleitbretter 9 sliding connection in lock shell 1, connect gleitbretter 9 with lock shell 1 relative slip to drive spring bolt 2 pops out or retracts in lock shell 1.

The sliding connection between the connecting sliding piece 9 and the lock shell 1 can be realized by arranging a sliding block at the bottom of the connecting sliding piece 9, the lock shell 1 is provided with a sliding rail, and the sliding connection between the connecting sliding piece 9 and the lock shell 1 can be realized when the sliding block moves back and forth on the sliding rail; in addition, a strip-shaped hole 902 can be formed in the connecting sliding piece 9, a limiting rod 903 is arranged on the lock shell 1, the lock shell 1 is sleeved outside the limiting rod 903, the connecting sliding piece 9 slides back and forth along the limiting rod 903 through the strip-shaped hole 902, the thickness between the connecting sliding piece 9 and the lock shell 1 can be reduced, and the overall thickness of the lock body can be reduced. In this embodiment, the strip-shaped hole 902 is disposed outside a horizontal center line (e.g., an O-line in fig. 2) of the connecting sliding piece 9 and near one side of the lock case 1, so that the connecting sliding piece 9 has a more compact structure and is beneficial to reducing the volume; and the strip-shaped hole 902 is parallel to the side edge 102 of the lock case 1, so that the connecting sliding piece 9 can move along the side edge 102 of the lock case 1 when moving, and the phenomenon that the connecting sliding piece 9 shifts in the moving process to influence the popping or retracting action of the bolt 2 is avoided.

In this embodiment, a notch 901 is provided at a position outside a horizontal center line (for example, an O line in fig. 2) of the connecting sliding piece 9, which is far away from an outer edge line of the lock case 1, and the notch 901 extends from the outer edge line of the connecting sliding piece 9 to the horizontal center line of the connecting sliding piece 9, so that the connecting sliding piece 9 has a bevel edge, and the notch 901 can further reduce the volume of the connecting sliding piece 9, and provide a sufficient installation space for other components.

In addition, a pin hole is formed in the connecting sliding piece 9, and the pin hole can be used for connecting the connecting sliding piece 9 and the connecting rod 8 after a pin rod is inserted; because the connecting sliding piece 9 is generally made of metal, a hole is formed in the connecting sliding piece 9 made of metal generally by adopting a drilling mode, in order to avoid that the connecting sliding piece 9 is cracked due to the fact that the pin hole is too close to the edge position of the connecting sliding piece 9 during drilling, the hole forming position of the pin hole is arranged at the position, close to the middle, of the connecting sliding piece 9, and the shortest distance from the pin hole to the oblique edge is kept to be the same as the shortest distance from the pin hole to the front side edge, used for connecting the end part of the bolt 2, of the connecting sliding piece 9, so that the yield of the connecting sliding piece 9 is improved; simultaneously, connect through the pin rod on the pinhole connecting rod 8 makes connecting rod 8 can rotate as the axle by the pin rod under the drive of external force, and then drives connect gleitbretter 9 level front and back round trip movement, because connecting rod 8 does connect gleitbretter 9 to provide the power of forward or backward movement, if the position of pinhole is too close connect the edge of gleitbretter 9, connecting rod 8 drives the pin rod and promotes connect gleitbretter 9 and remove the in-process probably can appear because of long-term striking leads to connect the cracked condition of gleitbretter 9 to appear, the influence connect the stability that gleitbretter 9 removed.

Secondly, in order to minimize the overall size of the deadbolt assembly, the pin hole is located as close as possible to the side 102 of the housing 1, and therefore the pin hole is located outside the horizontal center line (e.g., line O in fig. 2) of the connecting slide 9 near one side of the housing 1, so that the knob 6 connected by the connecting rod 8 can also be located close to the side 102 of the housing 1, reducing the gap between the connecting slide 9, the knob 6 and the housing 1.

Will button is revolved piece 6 and is set up on the extension line of the moving path of connecting gleitbretter 9, be about to button is revolved piece 6 and is set up connect the rear of gleitbretter 9, can guarantee that button is revolved piece 6 and can normally rotate the time, still can avoid button is revolved piece 6 and takes too much space. Button is revolved 6 accessible and is inserted corresponding key or knob plectrum and drive its rotation, button is revolved 6 and is outwards extended there is connecting portion 602, can drive when button is revolved 6 connecting portion 602 with button is revolved 6 synchronous rotations. Button is revolved piece 6 can through its connecting portion 602 with 8 pin connections of connecting rod, make connecting rod 8 one end with connect gleitbretter 9 pin connections, the other end with connecting portion 602 pin connections, button is revolved 6 and can be passed through when rotatory connecting rod 8 drives connect gleitbretter 9 front and back round trip movement, realize spring bolt 2 pops out or retracts lock shell 1 is interior.

When the bolt 2 is completely ejected out of the lock case 1, a gap for sliding the connecting sliding piece 9 is formed between the knob 6 and the connecting sliding piece 9, the width of the gap between the knob 6 and the connecting sliding piece 9 is equal to the maximum sliding distance of the connecting sliding piece 9, and the maximum sliding distance of the connecting sliding piece 9 is equal to the length of the bolt 2 exposed out of the lock case 1 when the bolt is completely ejected out of the lock case 1; when the connecting sliding sheet 9 moves backwards to the maximum sliding distance, the bolt 2 can be driven to be completely retracted into the lock shell 1, and the edge line of the connecting sliding sheet 9 can be close to the outer contour of the button rotating piece 6, so that the whole bolt device is more compact in structure, the space in the lock shell 1 is fully utilized, and the space waste is reduced.

In this embodiment, the keyhole 601 on the knob 6 is a square hole, when the bolt 2 is completely ejected out of the lock case 1, the keyhole 601 of the knob 6 is in a horizontal state, when the knob 6 is rotated by 90 ° so that the bolt 2 is completely retracted into the lock case 1, the direction of the keyhole 601 is in a vertical direction, and the keyhole 601, the connecting portion 602 and the pin connection point of the connecting rod 8 are in the same vertical line, so that a user can clearly know what state the bolt 2 is in when using a key to unlock the lock case 1, that is, when the key is turned to a vertical state, the bolt 2 is completely retracted into the lock case 1, and the door can be opened; when the key is turned to be in a horizontal state, the bolt 2 is completely ejected out of the lock shell 1 at the moment, and the door locking action is finished; therefore, the situation that the normal operation of each linkage part in the lock shell 1 is influenced when a user twists a key at an excessively large or excessively small angle and the key is not twisted in place is avoided, and the user forcibly opens the door when the lock tongue 2 is not completely retracted, so that the lock tongue 2 is violently impacted with a door frame, the lock tongue 2 is damaged, and the overall service life of the lock body is influenced.

In addition, the knob member 6 is further provided with a supporting portion 603, and the supporting portion 603 is used for limiting the rotation direction and the rotation angle of the knob member 6, so as to avoid the influence of the excessive rotation of the knob member 6 on the linkage action of each structure in the lock case 1. The rotation range of the knob member is 0-90 °, when the knob member 6 is in a 0 ° state, the abutting portion 603 abuts against the side edge 102 of the lock case 1, and the connecting portion 602 is parallel to the side edge 102 of the lock case 1, at this time, the distance from the outermost end of the connecting portion 602 to the front panel 101 of the lock case 1 is the smallest, so that the bolt 2 is completely ejected out of the lock case 1, and the state is always maintained without applying an external force.

When the knob 6 is rotated 90 ° clockwise, the connecting portion 602 is perpendicular to the side 102 of the lock case 1, and the connecting portion 602 drives the connecting rod 8 to pull the connecting sliding piece 9 backward, so that the bolt 2 can be retracted into the lock case 1 completely.

In order to realize the automatic re-setting function of spring bolt 2 be equipped with torsional spring 7 on the lock shell 1, the one end of torsional spring 7 is berthhed on a double-screw bolt on the lock shell 1, the other end is connected support portion 603, work as spring bolt 2 pops out completely lock shell 1 is outer, and torsional spring 7 is in the lax state this moment, works as when button spiral piece 6 is rotatory, its connecting portion 602 with button spiral piece 6 rotates in step, this moment torsional spring 7 is in the state of tightening, under the condition that no external force was applyed when button spiral piece 6, can drive when torsional spring 7 resumes the lax state button spiral piece 6 reverse rotation, thereby pass through connecting rod 8 drives connect gleitbretter 9 will the closure pops up again lock shell 1 is outer.

In order to make the knob member 6 as close as possible to the side 102 of the lock case 1 and avoid too much space between the knob member 6 and the lock case 1, the connecting rod 8 connecting the connecting slide 9 and the knob member 6 is designed to be a curved structure, the specific structure of the connecting rod 8 can be changed according to the actual position of the knob member 6 for locking, the connecting rod 8 can be designed to be a bent structure, and also can be designed to be an arc-shaped structure, so long as the pin connection position of the connecting rod 8 and the connecting portion 602 is lower than the pin connection position of the connecting rod 8 and the connecting slide 9, the knob member 6 can be made as close as possible to the side 102 of the lock case 1; in this embodiment, the connecting rod 8 is configured to be an arc-shaped structure, the arc-shaped angle range of the connecting rod 8 is 25 ° to 35 °, the best implementation angle of the arc-shaped angle range is 30 °, and the arc-shaped opening of the connecting rod 8 faces to the side edge 102 of the lock case 1, so that when the bolt 2 is completely ejected out of the lock case 1 from the bolt 2, the pin connection point (point B in fig. 3) between the connecting rod 8 and the connecting portion 602 is closer to the side edge 102 of the lock case 1 than the pin connection point (point a in fig. 3) between the connecting rod 8 and the connecting slide 9, thereby greatly reducing the distance between the knob 6 and the side edge 102 of the lock case 1; when the locking is completely retracted into the lock case 1, the pin connection point (e.g., point a in fig. 6) between the connecting rod 8 and the connecting sliding piece 9 is closer to the side 102 of the lock case 1 than the pin connection point (e.g., point B in fig. 6) between the connecting rod 8 and the connecting portion 602, so that the knob 6 can be as close to the side 102 of the lock case 1 as possible, and the range of motion of the entire deadbolt assembly is reduced during the motion process, thereby preventing the deadbolt assembly from occupying too much space inside the lock case 1 and improving the space utilization inside the lock case 1.

In summary, the connecting rod 8 driven latch bolt device of the present invention has the following beneficial effects:

(1) the bolt 2 and the bolt device are arranged at the position close to the side edge 102 of the lock shell 1, so that the position of the edge of the lock shell 1 can be fully utilized to the maximum extent;

(2) through the arrangement of the strip-shaped hole 902 on the connecting sliding piece 9, the limiting rod 903 is arranged on the lock shell 1, after the lock shell 1 is sleeved outside the limiting rod 903, the connecting sliding piece 9 slides back and forth along the limiting rod 903 through the strip-shaped hole 902, the thickness between the connecting sliding piece 9 and the lock shell 1 can be reduced, and the reduction of the whole thickness of the lock body is facilitated;

(3) a notch 901 is arranged at the outer side line of the horizontal centerline of the connecting sliding piece 9, which is far away from the lock shell 1, and the notch 901 can further reduce the volume of the connecting sliding piece 9 and provide enough installation space for other parts;

(4) because the connecting rod 8 provides a force for the connecting sliding piece 9 to move forwards or backwards, if the position of the pin hole is too close to the edge of the connecting sliding piece 9, the connecting rod 8 drives the pin rod to push the connecting sliding piece 9 to move, the connecting sliding piece 9 may be broken due to long-term impact in the moving process, and the moving stability of the connecting sliding piece 9 is influenced;

(5) the knob member 6 is arranged on an extension line of a moving path of the connecting slip sheet 9, that is, the knob member 6 is arranged behind the connecting slip sheet 9, so that the knob member 6 can be ensured to normally rotate, and the knob member 6 can be prevented from occupying too much space;

(6) when the connecting sliding piece 9 moves backwards to the maximum sliding distance, the bolt 2 can be driven to be completely retracted into the lock shell 1, and the edge line of the connecting sliding piece 9 can be close to the outer contour of the button rotating piece 6, so that the whole bolt device is more compact in structure, the space in the lock shell 1 is fully utilized, and the space waste is reduced;

(7) when the knob 6 is rotated by 90 degrees, so that the lock bolt 2 is completely retracted into the lock case 1, the direction of the key hole 601 is vertical, and the key hole 601 is positioned on the same vertical line with the connecting part 602 and the pin connecting points of the connecting part 602 and the connecting rod 8, so that a user can clearly know the state of the key when the user uses the key to unlock the lock, the lock bolt 2 can be retracted or ejected out of the lock case 1, and the situation that the user forcibly opens the door when the user is inappropriate is avoided, and the lock bolt 2 is damaged.

(8) The knob member 6 is further provided with a supporting portion 603, the supporting portion 603 is used for limiting the rotation direction and the rotation angle of the knob member 6, and the influence of the excessive rotation of the knob member 6 on the linkage action of each structure in the lock case 1 is avoided

(9) The connecting rod 8 is of an arc-shaped structure, the arc-shaped angle range of the connecting rod 8 is 25-35 degrees, the best implementation angle of the arc-shaped angle is 30 degrees, and the arc-shaped opening of the connecting rod 8 faces the side edge 102 of the lock shell 1, so that the button rotating piece 6 can be close to the side edge 102 of the lock shell 1 as far as possible, the movement range of the whole bolt device is reduced in the movement process, the bolt device is prevented from occupying too much inner space of the lock shell 1, and the space utilization rate in the lock shell 1 is improved.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.