阅读说明：本技术 带限位结构的锁具面板及锁具 (Lock panel with limiting structure and lock ) 是由 沈汉标 王妙玉 童威云 杨思民 刘健 林立新 于 2019-09-29 设计创作，主要内容包括：本发明公开了一种带限位结构的锁具面板及锁具,包括板体、旋钮以及锁芯定位轴,锁芯定位轴能够转动地安装于板体上,旋钮安装于锁芯定位轴上,且该旋钮外露于所述板体的顶面设置,板体的底面设有两个第一限位件,两个第一限位件绕锁芯定位轴的中心轴线依次设置,且两个第一限位件之间围合形成避让槽,锁芯定位轴上设有拨舌,拨舌延伸至避让槽并能够在避让槽中自由转动,当锁芯定位轴在旋钮的驱动下正转到位时,拨舌能够与其中一第一限位件抵接,当锁芯定位轴在旋钮的驱动下反转到位时,拨舌能够与另一第一限位件抵接。其能够减小旋钮的旋转行程,可有效降低锁芯定位轴与锁芯上的锁栓之间的冲击作用,避免损坏锁芯,有效提高锁芯的使用寿命。(the invention discloses a lockset panel with a limiting structure and a lockset, and the lockset panel comprises a plate body, a knob and a lock cylinder positioning shaft, wherein the lock cylinder positioning shaft can be rotatably arranged on the plate body, the knob is arranged on the lock cylinder positioning shaft and is exposed out of the top surface of the plate body, two first limiting parts are arranged on the bottom surface of the plate body, the two first limiting parts are sequentially arranged around the central axis of the lock cylinder positioning shaft, an avoiding groove is formed between the two first limiting parts in a surrounding manner, a shifting tongue is arranged on the lock cylinder positioning shaft, the shifting tongue extends to the avoiding groove and can freely rotate in the avoiding groove, when the lock cylinder positioning shaft rotates forwards and forwards in place under the driving of the knob, the shifting tongue can abut against one first limiting part, and when the lock cylinder positioning shaft rotates backwards and in place under the driving of the knob, the shifting tongue can abut against the other first limiting part. The rotary stroke of the knob can be reduced, the impact between the lock cylinder positioning shaft and the lock bolt on the lock cylinder can be effectively reduced, the damage to the lock cylinder is avoided, and the service life of the lock cylinder is effectively prolonged.)

1. The lock panel with the limiting structure is characterized by comprising a panel body, a knob and a lock cylinder positioning shaft, wherein the lock cylinder positioning shaft can be rotatably arranged on the panel body, the knob is arranged on the lock cylinder positioning shaft to drive the lock cylinder positioning shaft to rotate, the knob is exposed out of the top surface of the panel body, two first limiting parts are arranged on the bottom surface of the panel body, the two first limiting parts are sequentially arranged around the central axis of the lock cylinder positioning shaft, an avoiding groove is formed by enclosing the two first limiting parts, a shifting tongue is arranged on the lock cylinder positioning shaft and extends to the avoiding groove and can freely rotate in the avoiding groove, when the lock cylinder positioning shaft rotates forwards and forwards under the drive of the knob, the shifting tongue can abut against one of the first limiting parts, and when the lock cylinder positioning shaft rotates backwards and forwards under the drive of the knob, the shifting tongue can be abutted against the other first limiting piece.

2. the lock panel with a limiting structure according to claim 1, wherein an included angle between the two first limiting members is A, and A is greater than or equal to 90 degrees and less than or equal to 100 degrees.

3. The lock panel with the position-limiting structure according to claim 1, further comprising a torsion spring for resetting the knob, wherein the torsion spring has a positioning ring and two free ends extending from the positioning ring, the bottom surface of the plate body is provided with a first annular positioning protrusion and a second positioning member, the lock cylinder positioning shaft passes through the first annular positioning protrusion, the positioning ring is clamped on the first annular positioning protrusion, the second positioning member is located outside the avoiding groove, the second positioning member is located right at the middle position of the avoiding groove, the second positioning member and the shifting tongue are both located between the two free ends, when the lock cylinder positioning shaft is driven by the knob to rotate in place, one of the free ends can be shifted by the shifting tongue and abuts against the shifting tongue, and the other free end can be abutted with the second limiting piece.

4. The lock panel with a limiting structure according to claim 3, further comprising a positioning ring, wherein the positioning ring is clamped on an outer wall surface of the lock cylinder positioning shaft, the poking tongue is arranged on the positioning ring, the positioning ring is located between the plate body and the positioning ring, and the positioning ring can abut against the positioning ring.

5. The lockset panel of claim 4 wherein said locating ring has at least one retaining protrusion extending inwardly from an inner wall surface thereof, and said lock cylinder locating shaft has a retaining groove formed in an outer wall surface thereof for engaging with said retaining protrusion.

6. the lock panel with the limiting structure according to claim 5, wherein the length of the limiting groove extends in a direction parallel to the central axis of the lock cylinder positioning shaft, one end of the limiting groove close to the plate body is a closed end, and one end of the limiting groove far away from the plate body is provided with an opening for the clamping protrusion to enter.

7. the lock panel with the limiting structure according to claim 4, wherein the outer wall surface of the lock cylinder positioning shaft extends outward to form a second annular positioning protrusion, the positioning ring is clamped on the second annular positioning protrusion, and the outer diameter of the second annular positioning protrusion is larger than the outer diameter of the lock cylinder positioning shaft.

8. The lock panel with the limiting structure according to claim 4, wherein the lock panel with the limiting structure further comprises a clamp spring, a clamp spring groove is formed in an outer wall surface of the lock cylinder positioning shaft, the clamp spring is clamped in the clamp spring groove, the clamp spring groove is arranged close to the positioning ring, and the positioning ring is arranged closer to the plate body than the clamp spring groove.

9. The lock panel with the limiting structure according to claim 1, wherein a reinforcing plate is further disposed on the bottom surface of the plate body, the reinforcing plate is annular, the lock cylinder positioning shaft penetrates through the reinforcing plate, the two first limiting members are sequentially disposed around a central axis of the reinforcing plate, one end of each first limiting member is fixedly connected to the bottom surface of the plate body, and the other end of each first limiting member is fixedly connected to the reinforcing plate.

10. A lock comprising the lock panel with a retainer structure of any one of claims 1-9.

Technical Field

The invention relates to the technical field of locks, in particular to a lock panel with a limiting structure and a lock.

Background

most traditional door locks generally adopt a mechanical unlocking mode of a manual key, are relatively reliable in use, but are difficult to realize automatic control, and are not as easy as electric door locks to replace unlocking and locking conditions; later, the industry began to adopt electric control's lock, can pass through discernment such as infrared, fingerprint, card swiping, password, through the rotatory spring bolt that drives of logic circuit control motor and open and the locking, for avoiding appearing the condition that can't open or lock the door body because of the electric control trouble, still remain the mechanical lock structure of opening and locking through machinery in many electric door locks.

In the above mechanical lock structure, the lock cylinder is generally driven by a key outdoors to drive the lock bolt on the lock cylinder to rotate so as to drive the lock bolt to open or close, and the lock bolt is generally driven to rotate by twisting the knob indoors to drive the lock bolt to open or close.

However, in practice, the electric door lock with the above-mentioned mechanical lock structure still has the following technical problems:

Because the knob can rotate 360 degrees, and the bolt is opened or closed only by rotating the knob forwards or backwards by 45 degrees, when the lock is used, the lock core positioning shaft is easy to collide with parts on the lock bolt due to overlarge rotation stroke of the knob, so that the parts on the lock bolt, such as a spring, are easy to damage due to collision, the lock core is damaged, and the service life of the lock core is short;

Disclosure of Invention

In order to overcome the defects of the prior art, one of the purposes of the invention is to provide a lock panel with a limiting structure, which can reduce the rotation stroke of a knob, effectively reduce the impact between a lock cylinder positioning shaft and a lock bolt on the lock cylinder, avoid damaging the lock cylinder and effectively prolong the service life of the lock cylinder.

The second purpose of the present invention is to provide a lock with the above-mentioned lock panel with a position-limiting structure.

One of the purposes of the invention is realized by adopting the following technical scheme:

The lock panel with the limiting structure comprises a panel body, a knob and a lock cylinder positioning shaft, wherein the lock cylinder positioning shaft can be rotatably installed on the panel body, the knob is installed on the lock cylinder positioning shaft to drive the lock cylinder positioning shaft to rotate, the knob is exposed out of the top surface of the panel body, two first limiting parts are arranged on the bottom surface of the panel body, the two first limiting parts are sequentially arranged around the central axis of the lock cylinder positioning shaft, a dodging groove is formed by enclosing the two first limiting parts, a poking tongue is arranged on the lock cylinder positioning shaft and extends to the dodging groove and can freely rotate in the dodging groove, when the lock cylinder positioning shaft rotates in place under the driving of the knob, the poking tongue can be abutted against one of the first limiting parts, and when the lock cylinder positioning shaft rotates in place under the driving of the knob, the shifting tongue can be abutted against the other first limiting piece.

Furthermore, the included angle between the two first limiting parts is A, and A is more than or equal to 90 degrees and less than or equal to 100 degrees.

Further, take limit structure's tool to lock panel still including being used for the confession the torsional spring that the knob resets, the torsional spring have the position circle and by two free ends that the position circle extends out, the bottom surface of plate body is equipped with first annular location arch and second locating part, lock core location axle passes first annular location arch, the position circle card is located on the first annular location arch, the second locating part is located avoid outside the groove, just the second locating part is just right avoid the middle part position in groove, the second locating part and dial the tongue and all be located two between the free end, work as lock core location axle is in when the drive of knob is rotated to target in place down, one of them free end can be dialled the tongue and is stirred and should dial the tongue butt, and another free end can with second locating part butt.

Further, take limit structure's tool to lock panel still includes the holding ring, the holding ring card is located on the outer wall of lock core location axle, dial the tongue and locate on the holding ring, the locating ring is located the plate body with between the holding ring, just the holding ring can with the holding ring butt.

Furthermore, the inner wall surface of the positioning ring extends inwards to form at least one clamping protrusion part, and a limiting groove matched with the clamping protrusion part in a clamping manner is formed in the outer wall surface of the lock cylinder positioning shaft.

further, the length extending direction of the limiting groove is parallel to the central axis of the lock cylinder positioning shaft, the limiting groove is close to one end of the plate body and is a closed end, the limiting groove is far away from one end of the plate body is provided with an opening through which the clamping protruding part enters.

furthermore, the outer wall surface of the lock cylinder positioning shaft extends outwards to form a second annular positioning protrusion, the positioning ring is clamped on the second annular positioning protrusion, and the outer diameter of the second annular positioning protrusion is larger than that of the lock cylinder positioning shaft.

Further, the lock panel with the limiting structure further comprises a clamp spring, a clamp spring groove is formed in the outer wall surface of the lock cylinder positioning shaft, the clamp spring is clamped in the clamp spring groove, the clamp spring groove is close to the positioning ring, and the positioning ring is closer to the plate body than the clamp spring groove.

Furthermore, the bottom surface of plate body still is equipped with the gusset plate, the gusset plate is cyclic annular, lock core location axle passes the gusset plate, two first locating part winds the central axis of gusset plate sets gradually, the one end of first locating part with the bottom surface fixed connection of plate body, the other end of first locating part with gusset plate fixed connection.

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

The lockset comprises the lockset panel with the limiting structure.

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

the bottom surface of the plate body is provided with two first limiting parts which are sequentially arranged around the central axis of the lock cylinder positioning shaft, an avoidance groove is formed by enclosing between the two first limiting parts, the lock cylinder positioning shaft is provided with a shifting tongue which extends to the avoidance groove, the shifting tongue can freely rotate in the avoidance groove under the driving of the lock cylinder positioning shaft, the shifting tongue can freely move through the avoidance groove, when the knob rotates forwards or backwards, the shifting tongue can be prevented from blocking the rotation of the lock cylinder positioning shaft, so that the lock cylinder positioning shaft can smoothly rotate, when the lock cylinder positioning shaft rotates backwards in place under the driving of the knob, the shifting tongue can be abutted against the other first limiting part to play the roles of forward rotation and reverse rotation limiting, the rotation stroke of the knob can be reduced, the rotation stroke of the lock cylinder positioning shaft is reduced, and the overlarge impact on a lock bolt on the lock cylinder caused by overlarge rotation amplitude of the lock cylinder positioning shaft can be avoided, the lock cylinder can be protected, and the service life of the lock cylinder can be prolonged.

drawings

FIG. 1 is a schematic view of an internal structure of a lock panel with a position limiting structure according to the present invention;

FIG. 2 is an exploded view of the lock panel with a retainer shown in FIG. 1;

Fig. 3 is a schematic perspective view of a plate body in the lock panel with a limiting structure shown in fig. 2;

FIG. 4 is a schematic view of the lock panel with a position limiting structure shown in FIG. 2, wherein a knob is mounted on a lock cylinder positioning shaft;

FIG. 5 is a schematic view of a torsion spring in the lock panel with a position limiting structure shown in FIG. 2;

FIG. 6 is a perspective view of a retaining ring of the lock panel with a retaining structure shown in FIG. 2;

FIG. 7 is a block diagram of a knob of the lock panel with a position limiting structure shown in FIG. 1 at a first viewing angle in an initial state;

FIG. 8 is a block diagram of the lock panel with a position limiting structure shown in FIG. 7 from a second perspective;

FIG. 9 is a block diagram of the panel of the lockset with a position limiting structure shown in FIG. 1, shown from a first perspective, showing the knob in a reversed position;

FIG. 10 is a block diagram of the lock panel with a position limiting structure shown in FIG. 9 from a second perspective;

FIG. 11 is a view of the knob of the lock panel with a position limiting structure shown in FIG. 1 at a first viewing angle in a forward rotation position;

Fig. 12 is a block diagram of the lock panel with a position limiting structure shown in fig. 11 from a second perspective.

In the figure: 1. a plate body; 11. a first limit piece; 12. a second limiting member; 13. a first annular positioning projection; 14. a reinforcing plate; 2. a knob; 3. a lock cylinder positioning shaft; 31. a second annular positioning boss; 32. a limiting groove; 33. a clamp spring groove; 4. a torsion spring; 41. positioning rings; 42. a free end; 5. a positioning ring; 51. pulling the tongue; 52. a clamping convex part; 6. and a clamp spring.

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.

Referring to fig. 1-2, a lock panel with a limiting structure according to a preferred embodiment of the present invention is shown, which includes a panel body 1, a knob 2 and a lock cylinder positioning shaft 3, wherein the lock cylinder positioning shaft 3 is rotatably installed on the panel body 1, and a square hole is formed in the lock cylinder positioning shaft 3, the square hole is used for being matched with a lock cylinder, the panel body 1 is a rear panel of the lock, when the lock panel body 1 is installed, the panel body 1 is located indoors, it can be understood that the panel body 1 and a front panel surround to form an outer shell of the lock, as shown in fig. 4, the knob 2 is installed on the lock cylinder positioning shaft 3 to drive the lock cylinder positioning shaft 3 to rotate, and the knob 2 is exposed on a top surface of the panel body 1, so that people can turn the knob 2 by hand.

as shown in fig. 3, as a preferred embodiment, two first limiting members 11 are disposed on the bottom surface of the plate body 1, the two first limiting members 11 are sequentially disposed around the central axis of the lock cylinder positioning shaft 3, an avoiding groove is formed between the two first limiting members 11, a shifting tongue 51 is disposed on the lock cylinder positioning shaft 3, the shifting tongue 51 extends to the avoiding groove, the shifting tongue 51 can be driven by the lock cylinder positioning shaft 3 to freely rotate in the avoiding groove, the shifting tongue 51 can freely move by the arrangement of the avoiding groove, when the knob 2 rotates forward or backward, the shifting tongue 51 can be prevented from obstructing the rotation of the lock cylinder positioning shaft 3, so that the lock cylinder positioning shaft 3 can smoothly rotate. Specifically, referring to fig. 11 and 12, when the lock cylinder positioning shaft 3 is driven by the knob 2 to rotate forward to a proper position, the shifting tongue 51 can abut against one of the first limiting members 11, referring to fig. 9 and 10, when the lock cylinder positioning shaft 3 is driven by the knob 2 to rotate backward to a proper position, the shifting tongue 51 can abut against the other first limiting member 11 to perform the forward and backward limiting functions, so as to reduce the rotational stroke of the knob 2 and reduce the rotational stroke of the lock cylinder positioning shaft 3, thereby avoiding the excessive impact on the lock bolt on the lock cylinder due to the excessively large rotational amplitude of the lock cylinder positioning shaft 3, protecting the lock cylinder, and prolonging the service life of the lock cylinder, and in addition, when the knob 2 and the lock cylinder positioning shaft 3 are separately arranged, by limiting the rotational stroke of the lock cylinder positioning shaft 3, the impact between the lock cylinder positioning shaft 3 and the lock bolt can be reduced to influence on the connection relationship between the knob 2 and the lock cylinder positioning shaft 3, the connecting failure between the knob 2 and the lock cylinder positioning shaft 3 can be effectively avoided, and the service life of the lock panel with the limiting structure can be integrally prolonged. Of course, in the present embodiment, the knob 2 and the key cylinder positioning shaft 3 may be integrally provided.

As the preferred embodiment, the included angle between two first locating parts 11 is A, A is more than or equal to 90 degrees and less than or equal to 100 degrees, through limiting A in this scope, make the minimum stroke of knob 2 equal to or slightly greater than the stroke of the lock bolt on the lock core, can avoid knob 2 to rotate excessively, thus avoid lock core positioning shaft 3 to rotate excessively, can play the effect of protecting the lock core, can further lengthen the life time of the lock core, in addition, make the minimum stroke of knob 2 equal to or slightly greater than the stroke of the lock bolt on the lock core, can improve the efficiency of unlocking and closing the lock with lock panel of this area limit structure. Specifically, A can be equal to 90 degrees, at the moment, the minimum stroke of forward rotation and reverse rotation of the knob 2 is 45 degrees, the unlocking or locking of a lock bolt on the lock can be just driven, when A is equal to 100 degrees, the minimum stroke of forward rotation and reverse rotation of the knob 2 is 50 degrees, the minimum stroke of forward rotation or reverse rotation of the knob 2 is slightly larger than the stroke (generally 45 degrees) of a lock bolt on the lock core, and the situation that the lock bolt is not unlocked or locked in place can be prevented.

as a preferred embodiment, the lock panel with a limiting structure further includes a torsion spring 4 for resetting the knob 2, as shown in fig. 5, the torsion spring 4 has a positioning ring 41 and two free ends 42 extending from the positioning ring 41, as shown in fig. 3, the bottom surface of the plate body 1 is provided with a first annular positioning protrusion 13 and a second limiting member 12, the lock core positioning shaft 3 passes through the first annular positioning protrusion 13, the positioning ring 41 is clamped on the first annular positioning protrusion 13, the second limiting member 12 is located outside the avoiding groove, the second limiting member 12 faces the middle position of the avoiding groove, the second limiting member 12 and the shifting tongue 51 are both located between the two free ends 42, when the lock core positioning shaft 3 rotates to a position under the driving of the knob 2, one of the free ends 42 can be shifted by the shifting tongue 51 and abuts against the shifting tongue 51, and the other free end 42 can abut against the second limiting member 12, thus, when the knob 2 rotates forwards or backwards to the right position, the torsion spring 4 will generate an acting force opposite to the forward or reverse direction of the knob 2, during the process of rotating the knob 2, a rotation hand feeling can be generated, and simultaneously, the rotation of the knob 2 can be smoother, when the knob 2 rotates forwards or backwards to the right position and the knob 2 is loosened, the torsion spring 4 resets to enable the two free ends 42 thereof to be located at the two ends of the second limiting member 12, and the torsion spring 4 toggles the toggle tongue 51 when resetting, so that the lock cylinder positioning shaft 3 resets under the action of the toggle tongue 51, that is, the knob 2 resets to the initial state, as shown in fig. 7 and 8 in particular, the structure diagram of the knob 2 in the initial state is shown, in the state, in which the knob 2 is kept vertical, and the knob 2 is located at the middle position of the two first limiting members 11, the knob 2 in the vertical state can be more convenient for people to, in this state, the corotation of knob 2 and the stroke of reversal are the shortest, can effectively improve and unblank and close the lock efficiency, and in addition, the appearance of knob 2 under this vertical state is more pleasing to the eye to make this take limit structure's tool to lock panel and tool to lock's appearance more pleasing to the eye.

as shown in fig. 1 and 6, the lock panel with the limiting structure further includes a positioning ring 5, the positioning ring 5 is clamped on an outer wall surface of the lock cylinder positioning shaft 3, the poking tongue 51 and the positioning ring 5 are integrally formed, the poking tongue 51 is located on an outer circumferential surface of the positioning ring 5, the positioning ring 41 is located between the plate body 1 and the positioning ring 5, and the positioning ring 41 can abut against the positioning ring 5. So, make and dial tongue 51 and lock core location axle 3 components of a whole that can function independently setting, can effectively reduce the manufacturing degree of difficulty of lock core location axle 3, simultaneously, through setting up this holding ring 5, can play the spacing effect of axial to the position circle 41 of torsional spring 4, this position circle 41 of torsional spring 4 can avoid the position circle 41 of torsional spring 4 and first annular location arch 13 to break away from and be connected under the limiting displacement of plate body 1 and holding ring 5.

With reference to fig. 6, the inner wall surface of the positioning ring 5 extends inward to form at least one clamping protrusion 52, and the outer wall surface of the cylinder positioning shaft 3 is provided with a limiting groove 32 in clamping fit with the clamping protrusion 52, so that the connection between the positioning ring 5 and the cylinder positioning shaft 3 can be reinforced, and the connection between the positioning ring 5 and the cylinder positioning shaft 3 is more reliable. In this embodiment, the inner wall surface of the positioning ring 5 is provided with two symmetrically distributed clamping protrusions 52, and correspondingly, the outer wall surface of the lock cylinder positioning shaft 3 is provided with two limiting grooves 32, so that the connection between the positioning ring 5 and the lock cylinder positioning shaft 3 is more reliable, and the difficulty in assembling the positioning ring 5 and the lock cylinder positioning shaft 3 can be avoided from increasing.

As shown in fig. 4, the length extending direction of the limiting groove 32 is parallel to the central axis of the lock cylinder positioning shaft 3, one end of the limiting groove 32 close to the plate body 1 is a closed end, and one end of the limiting groove 32 far from the plate body 1 is provided with an opening for the clamping protrusion 52 to enter, so as to facilitate the installation of the positioning ring 5.

With continued reference to fig. 4, the outer wall surface of the cylinder positioning shaft 3 extends outward to form a second annular positioning protrusion 31, the positioning ring 5 is clamped on the second annular positioning protrusion 31, and the outer diameter of the second annular positioning protrusion 31 is greater than the outer diameter of the cylinder positioning shaft 3, so as to further improve the reliable connection between the positioning ring 5 and the cylinder positioning shaft 3.

As shown in fig. 1, as a preferred embodiment, the lock panel with the limiting structure further includes a clamp spring 6, a clamp spring groove 33 is formed in an outer wall surface of the lock cylinder positioning shaft 3, the clamp spring 6 is clamped in the clamp spring groove 33, the clamp spring groove 33 is disposed near the positioning ring 5, and the positioning ring 5 is disposed closer to the plate body 1 than the clamp spring groove 33. Therefore, the positioning ring 5 can be axially limited, the positioning ring 5 is prevented from being separated from the lock cylinder positioning shaft 3, and the connection relation between the positioning ring 5 and the lock cylinder positioning shaft 3 is further strengthened.

As shown in fig. 3, a reinforcing plate 14 is further disposed on the bottom surface of the plate body 1, the reinforcing plate 14 is annular, the lock cylinder positioning shaft 3 penetrates through the reinforcing plate 14, the two first limiting members 11 are sequentially disposed around a central axis of the reinforcing plate 14, one end of each first limiting member 11 is fixedly connected to the bottom surface of the plate body 1, and the other end of each first limiting member 11 is fixedly connected to the reinforcing plate 14. Therefore, the connection between the first limiting member 11 and the plate body 1 can be reinforced, so that the connection between the first limiting member 11 and the plate body 1 is more reliable, the first limiting member 11 is prevented from being easily disconnected from the plate body 1 due to the impact of the shifting tongue 51, and the service life is prolonged.

The lockset of the invention comprises the lockset panel with the limiting structure. It can be understood that the lock may be a mechanical lock or an electric lock, wherein the electric lock may specifically be a fingerprint lock, an infrared sensing lock, a swipe lock, a combination lock, or the like.

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.