CN111411837A - Padlock - Google Patents

Abstract

The invention provides a padlock including a lock shell, the lock shell is provided with a first lock hole and a second lock hole, and an elastic member is arranged in the first lock hole; a U-shaped lock rod, the U-shaped lock rod has a first lock rod and a second lock rod a rod, the first lock rod is clamped in the first lock hole, and the first lock rod is set with a locking position; the locking structure is arranged in cooperation with the lock shell, and the locking structure includes a driving assembly and a locking assembly; the locking assembly includes a locking rod, a rotating rod and a torsion spring, the locking rod is fixed on the rotating rod, the torsion spring is mounted on the rotating rod, and the locking rod abuts the first locking rod. The padlock of the invention has a lock shell, a U-shaped lock rod and a locking structure. An elastic member is arranged in the first lock hole to realize the automatic ejection of the first lock rod. The first locking bar of the U-shaped locking bar abuts, which enables the locking bar to reliably lock or unlock the first locking bar, and the locking structure has a simple structure and high reliability of locking or unlocking.

Description

padlock

technical field

The present invention relates to the technical field of pair locks, in particular to a padlock.

Background technique

Padlocks are commonly used locks and are widely used to lock gates, warehouse doors and house doors. There are various unlocking structures of existing padlocks, such as locking or unlocking the U-shaped lock lever by setting the back and forth movement of the lock tongue, but the setting of the lock tongue is complicated inside the locking structure, which is easy to cause damage and low reliability. Therefore, it is necessary to improve the existing locking structure to develop a new locking structure to improve reliability.

SUMMARY OF THE INVENTION

Aiming at the problems of complex locking structure and poor stability in the above-mentioned prior art, the purpose of the present invention is to optimally design a new locking structure, which has the advantages of convenient use and high stability.

In order to achieve the above object, the present invention adopts the following technical solutions:

A padlock including

a lock case, the lock case is provided with a first lock hole and a second lock hole, and an elastic member is arranged in the first lock hole;

U-shaped lock rod, the U-shaped lock rod has a first lock rod and a second lock rod, the first lock rod is clamped in the first lock hole, and the first lock rod is set with a locking position;

a locking structure, the locking structure is arranged in cooperation with the lock shell, and the locking structure includes a driving component and a locking component;

The locking assembly includes a locking rod, a rotating rod and a torsion spring, the locking rod is fixed on the rotating rod, the torsion spring is installed on the rotating rod, and the locking rod abuts the first locking rod;

The first locking rod compresses the elastic member in the first locking hole, and drives the second locking rod to extend into the second locking hole, and the locking rod is locked in the locking position to realize locking;

The driving component drives the locking rod to rotate, so that the locking rod is far away from the locking position and compresses the torsion spring, and the elastic piece resumes driving the first locking rod to move, and drives the second locking rod to slide out of the second locking hole;

The torsion spring is restored, the locking lever is reset, and the unlocking is realized.

Preferably, the locking position has a first ring groove structure, and one end of the locking rod is provided with a bent portion, and the bent portion can be engaged with the first ring groove structure.

Preferably, the lock housing is provided with a first snap portion and a second snap portion at intervals;

The first clamping part is provided with a first through hole, the second clamping part is provided with a second through hole, and the first through hole and the second through hole constitute a first locking hole;

The locking rod is arranged between the first engaging portion and the second engaging portion.

Preferably, the padlock further includes a limit rod;

The first locking rod is provided with a second ring groove structure, and the second ring groove structure is placed in the second through hole;

The second engaging portion defines a third through hole, and the limiting rod passes through the third through hole and abuts against the second ring groove structure.

Preferably, the end of the first locking rod is provided with an annular protrusion, the first locking rod is slidably disposed in the second through hole, the annular protrusion is exposed at the orifice of the second through hole, and the diameter of the annular protrusion is larger than the second through hole.

Preferably, the lock housing is further provided with a third engaging portion and a convex portion, the third engaging portion defines a second locking hole, and the convex portion abuts against the aperture of the second locking hole.

Preferably, the drive assembly includes a fingerprint identification mechanism, a circuit board, a motor and a first link;

The fingerprint identification mechanism is exposed on the casing, the fingerprint identification mechanism is connected to the circuit board, the circuit board is connected to the motor, the first connecting rod is fixed with the output shaft of the motor, and the first connecting rod is provided with an eccentric column;

The locking rod is fixed on the rotating rod to form a lever structure, and the locking rod abuts against the eccentric column.

Preferably, the torsion spring includes a torsion spring body and a first abutting portion and a second abutting portion extending along both ends of the torsion spring body, the torsion spring body is sleeved on the outside of the rotating rod, and the first abutting portion abuts on the outer side of the rotating rod. For the locking lever, the first abutting portion and the eccentric column are located on opposite sides of the locking lever, and the second abutting portion abuts against the locking assembly.

Preferably, the drive assembly includes a lock cylinder, a key and a second connecting rod;

The key is matched with the lock cylinder, one end of the second connecting rod is clamped and fixed with the output shaft of the lock cylinder, and the other end of the second connecting rod is clamped with the rotating rod;

The key drives the output shaft of the lock cylinder to rotate, and the second connecting rod drives the rotating rod to rotate, compresses the torsion spring, and the locking rod rotates away from the locking position;

The torsion spring returns to reset the locking lever.

Preferably, the other end of the second connecting rod is provided with an engaging hole, the rotating rod is clamped in the engaging hole, the inner wall of the engaging hole is provided with a groove, and the position opposite the rotating rod and the groove is provided with a raised portion, and the rotating rod drives the The protrusion swings in the groove.

The padlock of the invention has a lock shell, a U-shaped lock rod and a locking structure. An elastic member is arranged in the first lock hole to realize the automatic ejection of the first lock rod. The first locking bar of the U-shaped locking bar abuts, which enables the locking bar to reliably lock or unlock the first locking bar, and the locking structure has a simple structure and high reliability of locking or unlocking.

Description of drawings

Fig. 1 is the structural representation of padlock;

Fig. 2 is the structural representation of another angle of Fig. 1;

Fig. 3 is the structural representation of upper shell;

Figure 4 is a partially exploded view of Figure 1;

Fig. 5 is the structural representation of another angle of Fig. 4;

Fig. 6 is the partial structure schematic diagram of the padlock;

Fig. 7 is the structural representation of torsion spring;

Fig. 8 is a partial structural schematic diagram of another embodiment of the padlock;

Figure 9 is a partially exploded view of the padlock;

Fig. 10 is a partial exploded view on the basis of Fig. 9;

Figure 11 is a partially exploded view of the locking mechanism;

FIG. 12 is a partial structural schematic diagram of the locking mechanism.

The reference numbers are as follows:

100-padlock, 1-U-shaped locking lever, 11-second locking lever, 12-first locking lever, 121-locking position, 122, 122a-engaging protrusion, 123-second ring groove structure, 124, 124a -Annular protrusion; 2-lock shell, 21-upper shell, 210-first through hole, 211-TSA logo, 212-opening, 213-first clamping part, 214-limiting rod, 216-second Clamping part, 217-third through hole, 218-third clamping part, 219-second locking hole, 220-second through-hole, 240-first locking hole, 22-lower shell, 221-convex part; 3-locking structure, 31-fingerprint identification mechanism, 311-installation plate, 3111-installation position, 32-power supply, 33-lock cylinder, 34-motor, 35-first connecting rod, 351-eccentric column, 36-torsion spring , 361-torsion spring body, 362-first abutting part, 363-second abutting part, 37-locking rod, 371-bending part, 3711-inclined structure, 38-rotating rod, 381-protruding part, 39-second connecting rod, 391-protruding rod, 392-engaging hole, 3921-groove, 310-circuit board, 3101-indicator; 4-elastic part; 5-locking assembly.

Detailed ways

The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

Please refer to FIG. 1 and FIGS. 4-5 , the padlock 100 includes a U-shaped lock rod 1 , a lock shell 2 and a locking structure 3 , wherein the locking structure 3 is arranged in cooperation with the lock shell 2 , and under the action of the locking structure 3 , the lock shell 2 The padlock 100 can be interlocked with the U-shaped lock rod 1 to achieve the purpose of locking gates, warehouse doors, luggage, cabinets, etc. of the padlock 100 .

Please continue to refer to Figures 1-4, the lock shell 2 is divided into an upper shell 21 and a lower shell 22, the upper shell 21 and the lower shell 22 are buckled together to form an installation space (not shown), the U-shaped lock rod 1 and the locking structure 3 are erected In the installation space, the upper shell 21 is installed with the TSA logo 211 . The locking structure 3 includes a driving component (not shown) and a locking component 5, and the driving component can drive the locking component 5 to interact with the U-shaped locking rod 1 to realize unlocking.

Please continue to refer to FIGS. 2-6 , the upper shell 21 defines a first locking hole 240 and a second locking hole 219 , the first locking hole 240 is provided with an elastic member 4 , and the elastic member 4 is used for bouncing up the first locking rod 12 Structure, the elastic member 4 may be a spring. The U-shaped lock lever 1 has a first lock lever 12 and a second lock lever 11 . The first lock lever 12 is clamped in the first lock hole 240 , the first lock lever 12 is provided with a locking position 121 , and the locking assembly 5 includes the locking lever 37 , The rotation lever 38 and the torsion spring 36 , the locking lever 37 is fixed to the rotation lever 38 , and the torsion spring 36 is mounted on the rotation lever 38 . When locking is required, the first locking rod 12 compresses the elastic member 4 in the first locking hole 240, and drives the second locking rod 11 to be clamped in the second locking hole 219. At this time, the locking rod 37 is locked in the locking position 121; it needs to be unlocked When the lock lever 37 is directly driven to rotate or the rotation lever 38 drives the rotation of the lock lever 37, the lock lever 37 is moved away from the locking position 121 and compresses the torsion spring 36, and the elastic member 4 resumes driving the first lock lever 12 to move, driving the The second locking rod 11 is away from the second locking hole 219 to realize unlocking.

It can be seen from this that the padlock 100 is provided with an elastic member 4 in the first lock hole 240 to realize the automatic ejection of the first lock rod 12 , and by setting the torsion spring 36 , the lock rod 37 and the first lock rod 12 are always in contact with each other. In the connected state, the locking lever 37 can reliably lock or unlock the locking position 121 of the first locking lever 12, and the above-mentioned mechanism can be reliably locked or unlocked through the action of several components.

In the first locking lever 12, the specific structure of the locking position 121 may be a notch or a hole. Please refer to FIG. 8. In this embodiment, the locking position 121 has a first ring groove structure; please refer to FIG. 11 and FIG. 12. One end of the locking rod 37 is provided with a bent portion 371, and both sides of the bent portion 371 are provided with an inclined structure 3711; this matching structure can increase the locking stability of the locking position 121 and the locking rod 37, and increase the reliability of locking sex.

For the specific arrangement of the first locking rod 12 to be engaged with the first locking hole 240, please refer to FIGS. 3-6. The first locking rod 12 is also provided with a second ring groove structure 123, which is a locking position 121 of the first ring groove structure. There is an engaging protrusion 122 between the second ring groove structure 123 and an annular protrusion 124 at the end of the first locking rod 12 . The upper shell 21 is provided with a first clamping portion 213 and a second clamping portion 216 at intervals, the first clamping portion 213 is provided with a first through hole 210 , the second clamping portion 216 is provided with a second through hole 220 , and the first through hole 210 The second through hole 220 and the second through hole 220 constitute a first locking hole 240 , the second engaging portion 216 is further provided with a third through hole 217 , and the limiting rod 214 can pass through the third through hole 217 . The first locking rod 12 can slide in the first locking hole 240 , the second annular groove structure 123 is placed in the second through hole 220 , and the limiting rod 214 passes through the third through hole 217 and abuts against the second annular groove Structure 123. Since the diameter of the second annular groove structure 123 is smaller than the annular protrusion 124 and the engaging protrusion 122 , when unlocking, the first locking rod 12 slides outward in the first locking hole 240 , and the limiting rod 214 abuts against the annular protrusion 124. When locked, the first lock rod 12 slides inward in the first lock hole 240, and the limit rod 214 abuts against the engaging protrusion 122. In this way, the limit rod 214 limits the movement of the first lock rod 12. bit effect.

In addition, in FIG. 8 , another setting method in which the first lock lever 12 is clamped to the first lock hole 240 is also given. Specifically, the first lock lever 12 is provided with an engagement protrusion 122a, and the engagement protrusion The diameter of 122a is the same as that of the second through hole 220, and the second annular groove structure 123 is not provided. At this time, the first locking rod 12 is slidably disposed in the second through hole 220 , but the annular protrusion 124 a is exposed at the opening of the second through hole 220 , and the diameter of the annular protrusion 124 a is larger than that of the second through hole 220 . When unlocking, the first lock rod 12 slides outward in the first lock hole 240, and the annular protrusion 124a abuts against the second through hole 220. When locked, the first lock rod 12 slides inward in the first lock hole 240 to lock The rod 37 is clamped to the locking position 121 , so that the movement of the first lock rod 12 is restricted, and it is not necessary to provide a limit rod 214 to limit the movement of the first lock rod 12 .

Referring to FIGS. 3-5 , the upper shell 21 is further provided with a third engaging portion 218 , and the third engaging portion 218 defines a second locking hole 219 . The second locking rod 11 can extend into the second locking hole 219 . In order to prevent the second locking rod 11 from passing through the second locking hole 219 , a convex portion 221 is provided on the lower shell 22 , and the convex portion 221 abuts against the second locking hole 219 The second locking rod 11 extends into the second locking hole 219 to abut against the convex portion 221 .

Referring to FIGS. 3-7 , the locking assembly 5 includes a locking lever 37 , a rotating lever 38 and a torsion spring 36 . The torsion spring 36 includes a torsion spring body 361 and a first abutting portion 362 and a second abutting portion 363 extending along both ends of the torsion spring body 361. The torsion spring body 361 is sleeved on the outside of the rotating rod 38. The abutting portion 362 abuts against the locking lever 37 , and the second abutting portion 363 abuts against the locking assembly 5 . When the locking lever 37 is moved away from the first locking lever 12 around the rotating rod 38 , the torsion spring 36 is compressed. Under the recovery action of the spring 36 , the locking lever 37 abuts the first locking lever 12 again.

Under the above structure, when locking is required, the first locking rod 12 compresses the elastic member 4 in the first locking hole 240, and drives the second locking rod 11 to extend into the second locking hole 219. At this time, the bending of the locking rod 37 The folded portion 371 is locked in the locking position 121, so that the U-shaped lock rod 1 is locked in the first lock hole 240 and the second lock hole 219 of the lock shell 2 through the locking assembly 5; when the lock needs to be unlocked, the bending of the locking rod 37 is driven The portion 371 moves away from the locking position 121 and compresses the torsion spring 36. The elastic member 4 resumes driving the first lock lever 12 to move outward, and drives the second lock lever 11 away from the second lock hole 219 and away from the open end of the second lock hole 219. Unlock.

There are many kinds of driving components for driving the locking lever 37 to rotate to realize unlocking. In this embodiment, two are provided. For the first unlocking structure, please refer to FIG. 6 and FIGS. 11-12. The drive assembly (not shown) includes a lock cylinder 33, a key (not shown) and a second connecting rod 39. The key matches the lock cylinder 33, and the second connecting rod One end of 39 is provided with a protruding rod 391 , the protruding rod 391 is clamped and fixed with the output shaft of the lock cylinder 33 , and the other end of the second connecting rod 39 is clamped with the rotating rod 38 . When the lock needs to be unlocked, the key drives the output shaft of the lock cylinder 33 to rotate, drives the rotating rod 38 to rotate through the second connecting rod 39, drives the locking rod 37 fixed to the rotating rod 38 away from the locking position 121, and compresses the torsion spring 36, the elastic member 4 Recovery, drive the first lock rod 12 to move outward, drive the second lock rod 11 away from the second lock hole 219 and away from the open end of the second lock hole 219 to achieve unlocking. After that, the key is rotated in the reverse direction, the lock cylinder 33 no longer exerts force on the rotating rod 38 , the torsion spring 36 is restored, and the locking rod 37 is reset to abut against the first locking rod 12 .

Please refer to 6 and Figures 9-10, a second unlocking structure is provided. The driving assembly includes a fingerprint identification mechanism 31 , a circuit board 310 , a motor 34 , a first link 35 , an indicator light 3101 and a power supply 32 . Power is provided by a power source 32, which may be a battery. The indicator light 3101 is arranged on the circuit board 310 and is partially exposed from the upper shell 21. The fingerprint identification mechanism 31 is exposed through the opening 212 of the upper shell 21 for pressing the fingerprint. The fingerprint identification mechanism 31 is connected to the circuit board 310, and the circuit board 310 is connected to the motor 34. The first connecting rod 35 is fixed with the output shaft of the motor 34, and the first connecting rod 35 is provided with an eccentric column 351. The eccentric column 351 and the first abutting portion 362 are located on opposite sides of the locking rod 37, so that the rotating eccentric column 351 can compress the torsion spring 36. When the lock needs to be unlocked, the user presses the fingerprint on the fingerprint identification area of the fingerprint identification mechanism 31, the fingerprint identification mechanism 31 identifies the fingerprint, the circuit board 310 determines whether it matches the fingerprint stored in the interior according to the fingerprint, and the indicator light 3101 will display according to the matching situation. different color. If it does not match, the motor 34 does not rotate. If it does not match, the circuit board 310 controls the motor 34 to rotate, driving the first link 35 to rotate, the eccentric column 351 drives the locking lever 37 to rotate, compresses the torsion spring 36, and the bending portion 371 (Fig. 11) Away from the locking position 121 , the elastic member 4 recovers, drives the first lock rod 12 to move outward, drives the second lock rod 11 away from the second lock hole 219 , and leaves the open end of the second lock hole 219 to unlock. In addition, according to the relevant design of the circuit board 310, the circuit board 310 will control the motor 34 to rotate for several seconds, so that the eccentric column 351 rotates by a small angle such as less than 90°, but it is necessary to ensure that the locking position 121 can be connected to the bending portion 371 (Fig. 11) Separation.

In order to install and fix the circuit board 310 , the motor 34 , the first link 35 , the power supply 32 , the lock cylinder 33 , the second link 39 , the locking rod 37 and the rotating rod 38 , please refer to FIG. 5 , the padlock 100 is also provided with several Mounting boards 311, one of the mounting boards 311 is set on the circuit board 310, and a number of mounting positions 3111 are set on the mounting board 311. The mounting positions 3111 are used for the circuit board 310, the motor 34, the first connecting rod 35, the power supply 32, the lock cylinder 33. The second link 39, the locking lever 37 and the rotating lever 38 are engaged and fixed.

For the above two unlocking methods, either one can be set, or both can be set at the same time. In this embodiment, the padlock 100 adopts two unlocking methods simultaneously. However, in the second unlocking method, when the eccentric column 351 drives the locking lever 37 to rotate, since the locking lever 37 and the rotating lever 38 are fixed, the rotating lever 38 will also rotate, but the rotating lever 38 and one end of the second link 39 The other end of the second connecting rod 39 is fixed with the output shaft of the lock cylinder 33. At this time, it is difficult for the rotating rod 38 to rotate relative to the second connecting rod 39 and the lock cylinder 33, which will cause the eccentric column 351 to be unable to drive the locking rod 37. Rotate, that is, the second unlocking method will fail.

In order to solve this problem, the mutual influence of the above two unlocking methods when unlocking is avoided. 11-12, the locking rod 37 is fixed to the rotating rod 38 to form a lever structure, the other end of the second connecting rod 39 is provided with an engaging hole 392, the inner wall of the engaging hole 392 is provided with a groove 3921, the rotating rod 38 and the groove 3921 Protrusions 381 are provided at opposite positions. Because the first unlocking method is to drive the rotation of the second connecting rod 39 through the lock cylinder 33 to drive the rotating rod 38 to rotate, when the lock cylinder 33 drives the second connecting rod 39 to rotate, at this time, the raised portion 381 and the groove 3921 abut against each other. Therefore, the second connecting rod 39 drives the rotating rod 38 to rotate. Because of the second unlocking method, the eccentric column 351 drives the locking rod 37 to rotate and drives the rotating rod 38 to rotate. When the eccentric column 351 drives the locking rod 37 to rotate, the raised portion 381 can rotate relative to the groove 3921 by a certain angle. The locking rod 37 drives the rotating rod 38 to rotate, and the second link 39 will not block the rotation of the rotating rod 38 when the protrusion 381 rotates in the groove 3921 . By arranging the groove 3921 and the raised portion 381, the mutual influence generated when the two unlocking methods are unlocked is solved, and the independence of the two unlocking methods is ensured.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied to other related All technical fields are similarly included in the scope of patent protection of the present invention.

Claims (10)

1. a padlock, is characterized in that, comprises a lock case, wherein the lock case is provided with a first lock hole and a second lock hole, and an elastic member is arranged in the first lock hole; U-shaped lock lever, the U-shaped lock lever has a first lock lever and a second lock lever, the first lock lever is clamped in the first lock hole, and the first lock lever is provided with a locking position; a locking structure, the locking structure is arranged in cooperation with the lock housing, and the locking structure includes a driving component and a locking component; The locking assembly includes a locking lever, a rotating lever and a torsion spring, the locking lever is fixed to the rotating lever, the torsion spring is mounted on the rotating lever, and the locking lever abuts the first locking lever; The first locking rod compresses the elastic member in the first locking hole, and drives the second locking rod to extend into the second locking hole, and the locking rod is locked in the locking position to realize locking; The driving assembly drives the locking rod to rotate, so that the locking rod is away from the locking position and compresses the torsion spring, and the elastic member resumes driving the first locking rod to move, and drives the second locking rod to slide out of the second locking hole; The torsion spring is restored, the locking lever is reset, and unlocking is realized. 2 . The padlock according to claim 1 , wherein the locking position has a first ring groove structure, and one end of the locking rod is provided with a bent portion, and the bent portion can be engaged with the first ring groove structure. 3 . . 3 . The padlock according to claim 1 , wherein the lock housing is provided with a first engaging portion and a second engaging portion at intervals; 3 . The first clamping part is provided with a first through hole, the second clamping part is provided with a second through hole, and the first through hole and the second through hole constitute the first locking hole; The locking rod is arranged between the first clamping portion and the second clamping portion. 4. The padlock according to claim 3, characterized in that, further comprising a limit rod; The first locking rod is provided with a second ring groove structure, and the second ring groove structure is placed in the second through hole; The second engaging portion defines a third through hole, and the limiting rod passes through the third through hole and abuts against the second ring groove structure. 5 . The padlock according to claim 3 , wherein the end of the first lock rod is provided with an annular protrusion, the first lock rod is slidably disposed in the second through hole, and the ring The annular protrusion is exposed at the orifice of the second through hole, and the diameter of the annular protrusion is larger than that of the second through hole. 6 . The padlock according to claim 3 , wherein the lock housing is further provided with a third engaging portion and a convex portion, the third engaging portion defines the second locking hole, and the convex portion abuts against the second locking hole. 7 . connected to the orifice of the second locking hole. 7. The padlock according to claim 1, wherein the drive assembly comprises a fingerprint identification mechanism, a circuit board, a motor and a first link; The fingerprint identification mechanism is exposed on the casing, the fingerprint identification mechanism is connected to a circuit board, the circuit board is connected to a motor, the first connecting rod is fixed with the output shaft of the motor, and the first connecting rod is set eccentric column; The locking rod is fixed to the rotating rod to form a lever structure, and the locking rod abuts against the eccentric column. 8 . The padlock according to claim 7 , wherein the torsion spring comprises a torsion spring body and a first abutting portion and a second abutting portion extending along both ends of the torsion spring body, and the torsion spring body sleeved on the outside of the rotating rod, the first abutting portion abuts against the locking rod, the first abutting portion and the eccentric column are located on opposite sides of the locking rod, and the second abutting portion abuts against the locking rod. The leaning portion abuts against the locking assembly. 9. The padlock according to any one of claims 1 or 7, wherein the drive assembly comprises a lock cylinder, a key and a second connecting rod; the key is matched with the lock cylinder, one end of the second connecting rod is clamped and fixed with the output shaft of the lock cylinder, and the other end of the second connecting rod is clamped with the rotating rod; The key drives the output shaft of the lock cylinder to rotate, drives the rotating rod to rotate through the second connecting rod, compresses the torsion spring, and the locking rod rotates away from the locking position; The torsion spring returns to reset the lock lever. 10 . The padlock according to claim 9 , wherein the other end of the second connecting rod is provided with an engaging hole, the rotating rod is clamped in the engaging hole, and the inner wall of the engaging hole is provided with a groove. 11 . , a raised portion is provided at the position opposite to the groove of the rotating rod, and the rotating rod drives the raised portion to swing in the groove.

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