CN216974449U - Coded lock with side code-adjusting switch structure - Google Patents

Abstract

The utility model discloses a coded lock with a side code adjusting switch structure, which comprises a shell, a turnover seat, a back plate, a key, a hook seat, a movable block, a coded component, a first spring, a second spring and a code adjusting switch, wherein the code adjusting switch is translatably arranged on one side in the shell and is positioned on the side edge of a contact part of the movable block, the outer side of the code adjusting switch penetrates through a switch through hole arranged on the side wall of the shell and then extends outwards, and the code adjusting switch can translate so as to move to a translation path of the contact part to block the contact part to enable the movable block to translate in a direction incapable of locking normally, or move out from the translation path of the contact part to remove the limit blocking of the movable block. The code adjusting switch is arranged on the side edge of the coded lock, when the code is correct, a user can directly push the code adjusting switch from the outer side edge of the coded lock to adjust the code, the code adjusting switch is simple to operate, and the code adjusting operation is convenient for the user.

Description

Coded lock with side code-adjusting switch structure

Technical Field

The utility model relates to the technical field of locks, in particular to a coded lock with a side code adjusting switch structure.

Background

Along with the development of society, the number of times of people's trip is more and more, and when people went out, all can carry the case and bag and be used for placing object article, and people can set up the trick lock on the case and bag in order to prevent that the case and bag from being opened by other people at will.

However, the operation of a code adjusting switch of a coded lock on the market is complex, the code adjusting operation is inconvenient for users, and the user experience is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provides a coded lock with a side code adjusting switch structure.

In order to achieve the purpose, the utility model provides a coded lock with a side code adjusting switch structure, which comprises a shell, a turnover seat, a back plate, a key, a hook seat, a movable block, a coded assembly, a first spring, a second spring and a code adjusting switch, wherein a lock hook is arranged on the surface of the hook seat, one end of the shell is rotatably connected with the turnover seat through a rotating shaft, the back plate is arranged at the back of the shell, a lock hook through hole for the lock hook of the hook seat to penetrate through is formed in the back plate, the movable block is translatably arranged on the inner surface of the back plate, the coded assembly is positioned between the shell and the movable block, the first spring is positioned between the inner surface of the side wall of the shell and one end part of the movable block, a contact part is convexly arranged at one end part of the movable block, the code adjusting switch is translatably arranged at one side in the shell and positioned at the side edge of the contact part of the movable block, the outer side of the code adjusting switch penetrates through the switch through hole formed in the side wall of the shell and then extends outwards, transfer the sign indicating number switch and can translate to on moving the translation route of contact site, in order to block the contact site and make the movable block normal direction translation of locking, or shift out in the translation route of contact site and stop with the spacing of removing the movable block, the button is installed at the shell surface translationally, the second spring is located the button and keeps away from between the spacing portion of the first spring that the one end internal surface of movable block was equipped with and the spacing portion of the second spring that the back of shell was equipped with, the internal surface of button is equipped with and stretches into the shell inside and be used for colluding the piece that colludes the lock of seat colludes mutually, it is equipped with lock core subassembly to collude between translation route and the movable block of piece.

In a preferred embodiment, the plug assembly includes a swing block, a locking stop and a third spring, the locking stop is mounted on the back of the housing in a translatable manner and is located on one side of the movable block, the locking stop being capable of translating along a direction parallel to the translation direction of the movable block, the third spring is positioned between the inner surface of the side wall of the shell and one end of the locking stop block, the other end of the locking stop block is positioned on the translation path of the hook block of the key, the swing block is positioned between the movable block and the locking stop block, the middle part of the swing block is rotationally connected with a second rotating pin arranged on the back part of the shell, one end of the swinging block extends to one side of the movable block, the other end of the swinging block is connected with the locking stop block, the movable block can push the swing block to swing when translating in the unlocking direction, so that the swing block drives the locking stop block to translate, and the other end of the locking stop block exits from a translation path of the hook block.

In a preferred embodiment, a third rotating pin is arranged at the bottom of the locking stop block, a slot is arranged at the other end of the swinging block, and the third rotating pin is located in the slot of the swinging block.

As a preferred embodiment, the device further comprises a customs lock, wherein a customs lock mounting hole formed in the customs lock mounting shell is located at the side edge of the other end of the locking stop block, a customs lock hole corresponding to the position of the customs lock is formed in the key, and a rotary locking block of the customs lock can rotate and push the locking stop block to translate, so that the other end of the locking stop block exits from a translation path of the hook block of the key to release the limit blocking of the hook block.

As the preferred embodiment, the password subassembly includes at least one password wheel and at least one password wheel cooperation seat, the back of shell is equipped with at least one first commentaries on classics round pin, the password wheel is rotationally installed respectively on the first commentaries on classics round pin that corresponds separately, the password wheel hole of seting up on the shell is passed to one side of password wheel outwards stretches out, password wheel cooperation seat is connected respectively at the password wheel back that corresponds separately and can follow the password wheel and rotate, all is equipped with the slot on the circumference lateral wall of every password wheel cooperation seat, the movable block epirelief is equipped with the inserted block that can insert the slot of the password wheel cooperation seat that corresponds separately respectively.

As a preferred implementation mode, a plurality of hemispherical connecting lugs are convexly arranged on the back surface of the password wheel, a plurality of grooves for the connecting lugs to be inserted are annularly distributed on the top surface of the password wheel matching seat, the password wheel is inserted into the grooves of the password wheel matching seat through the connecting lugs so as to be connected with the password wheel matching seat, a fourth spring is arranged between each password wheel matching seat and the inner surface of the back plate, and the fourth spring is sleeved on the first rotating pin.

As a preferred embodiment, the inner surface of the side portion of the housing is provided with two positioning grooves which are positioned outside the code adjusting switch and are arranged at intervals along the translation direction of the code adjusting switch, the outer side of the code adjusting switch is convexly provided with a positioning block, and the code adjusting switch is inserted into the positioning grooves through the positioning block, so that positioning is realized.

As a preferred embodiment, the two sides of the back surface of the key are convexly provided with translation limiting parts extending along the length direction of the key, the translation limiting parts penetrate through hole positions formed in the shell and then are clamped with the inner surface of the shell, and the translation limiting parts can translate in the hole positions.

In a preferred embodiment, a fifth spring is arranged between the back of the shell and the overturning seat.

As a preferred embodiment, two sides of the back plate are provided with insertion holes, and two sides of the hook seat are provided with insertion posts for being inserted into the insertion holes.

Compared with the prior art, the utility model has the beneficial effects that:

1. the code adjusting switch is arranged on the side edge of the coded lock, when the code is correct, a user can directly push the code adjusting switch from the outer side edge of the coded lock to adjust the code, the code adjusting switch is simple to operate, and the code adjusting operation is convenient for the user.

2. The code adjusting switch positioning structure is arranged on the outer side of the code adjusting switch, and the shifting stress position of the code adjusting switch is arranged close to the outer side, so that the stress is better, a user can conveniently shift the code adjusting switch, and the code adjusting switch can be prevented from being blocked during shifting.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a combination lock with a side code-adjusting switch structure according to an embodiment of the present invention;

fig. 2 is an exploded schematic view of a combination lock with a side code-adjusting switch structure according to an embodiment of the present invention;

fig. 3 is a first exploded schematic view of a main body part of a combination lock with a side code-adjusting switch structure according to an embodiment of the present invention;

fig. 4 is a second exploded schematic view of a main body portion of a combination lock with a side code-adjusting switch structure according to an embodiment of the present invention;

fig. 5 is a schematic back structure diagram of a main body portion of a combination lock with a side code adjusting switch structure according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram (with the outer shell hidden) of a hooking portion of a combination lock with a side code adjusting switch structure according to an embodiment of the present invention;

fig. 7 is a schematic diagram of an internal structure of a combination lock with a side code adjusting switch structure according to an embodiment of the present invention (in a wrong combination, in a locked state);

fig. 8 is a schematic view of an internal structure of a combination lock with a side code adjusting switch structure according to an embodiment of the present invention (correct code, in an unlocked state);

fig. 9 is an enlarged schematic view of a code adjusting switch portion of a combination lock with a side code adjusting switch structure according to an embodiment of the present invention (the code adjusting switch is turned off);

fig. 10 is an enlarged schematic view of a code adjusting switch portion of a combination lock with a side code adjusting switch structure according to an embodiment of the present invention (the code adjusting switch is turned on);

fig. 11 is a back schematic view of a code wheel of a code lock with a side code adjusting switch structure according to an embodiment of the present invention;

FIG. 12 is a schematic view of a combination wheel engaging seat of a combination lock with a side code-adjusting switch structure according to an embodiment of the present invention;

fig. 13 is a schematic structural diagram of a movable block of a combination lock with a side code-adjusting switch structure according to an embodiment of the present invention;

fig. 14 is an enlarged structural view of a code adjusting and positioning portion of a housing of a combination lock with a side code adjusting switch structure according to an embodiment of the present invention;

fig. 15 is an exploded schematic view of a housing and a code adjusting switch of a combination lock with a side code adjusting switch structure according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 15, an embodiment of the present invention provides a combination lock with a side code adjusting switch structure, which includes a housing 1, a flip seat 2, a back plate 3, a key 4, a hook seat 5, a movable block 6, a combination component 7, a first spring 8, a second spring 9, a code adjusting switch 10, and a customs lock 18, and the structure and the operation principle of each component will be described below.

Collude the surface of seat 5 and be equipped with lock hook 51, the one end of shell 1 is rotated with upset seat 2 through pivot 11 and is connected, and backplate 3 is installed in 1 back of the body, sets up the lock hook through-hole 31 that the lock hook 51 that supplies to collude seat 5 passed on backplate 3, but movable block 6 installs at 3 internal surfaces of backplate translationally, and password subassembly 7 is located between shell 1 and the movable block 6, and first spring 8 is located between the lateral wall internal surface of shell 1 and a tip of movable block 6.

Preferably, the password assembly 7 may include three password wheels 71 and three password wheel matching seats 72, the back of the housing 1 is provided with three first rotating pins 14, the password wheels 71 are respectively rotatably mounted on the respective corresponding first rotating pins 14, one side of the password wheel 71 passes through the password wheel hole 15 formed in the housing 1 and extends outwards, the password wheel matching seats 72 are respectively connected to the back of the respective corresponding password wheels 71 and can rotate along with the password wheels 71, the circumferential side wall of each password wheel matching seat 72 is provided with a slot 721, and the movable block 6 is convexly provided with an insertion block 62 which can be respectively inserted into the slot 721 of the respective corresponding password wheel matching seat 72. Of course, in other embodiments, the number of the combination wheels and the related components associated therewith may vary according to the needs of the user, but is not limited to this embodiment.

Specifically, the back of the password wheel 71 may be convexly provided with a plurality of hemispherical connecting protrusions 711, the top surface of the password wheel matching seat 72 is annularly distributed with a plurality of grooves 722 into which the connecting protrusions 711 are inserted, the password wheel 71 is inserted into the grooves 722 of the password wheel matching seat 72 through the connecting protrusions 711, so as to be connected with the password wheel matching seat 72, a fourth spring 23 is arranged between each password wheel matching seat 72 and the inner surface of the back plate 3, and the fourth spring 23 is sleeved on the first rotating pin 14.

A contact part 61 is convexly arranged at one end part of the movable block 6, the code adjusting switch 10 can be installed on one side inside the shell 1 in a translation mode and is located on the side edge of the contact part 61 of the movable block 6, and the outer side of the code adjusting switch 10 penetrates through a switch through hole 12 formed in the side wall of the shell 1 and then extends outwards.

Preferably, the inner surface of the side portion of the housing 1 is provided with two positioning grooves 161 located outside the size adjusting switch 10 and spaced along the translation direction of the size adjusting switch 10, the outer side of the size adjusting switch 10 is convexly provided with a positioning block 101, and the size adjusting switch 10 is inserted into the positioning grooves 161 through the positioning block 101, so as to achieve positioning.

The button 4 can be installed on the surface of the shell 1 in a translation mode, the second spring 9 is located between a first spring limiting portion 41 arranged on the inner surface of one end, far away from the movable block 6, of the button 4 and a second spring limiting portion 13 arranged on the back of the shell 1, a hook block 42 which stretches into the interior of the shell 1 and is used for being hooked with a lock hook 51 of the hook seat 5 is arranged on the inner surface of the button 4, and a lock core assembly 24 is arranged between a translation path of the hook block 42 and the movable block 6.

In specific implementation, the lock cylinder assembly 24 may include a swing block 241, a locking stopper 242 and a third spring 243, the locking stopper 242 may be translatably installed at the back of the housing 1 and located at one side of the movable block 6, the locking stopper 242 may be translatable along a direction parallel to the translation direction of the movable block 6, the third spring 243 is located between an inner surface of a side wall of the housing 1 and one end of the locking stopper 242, the other end of the locking stopper 242 is located on the translation path of the hook block 42 of the key 4, the swing block 241 is located between the movable block 6 and the locking stopper 242, the middle of the swing block 241 is rotatably connected to the second pivot pin 25 provided at the back of the housing 1, one end of the swing block 241 extends to one side of the movable block 6, and the other end of the swing block 241 is connected to the locking stopper 242.

In this embodiment, the bottom of the locking stop block 242 may be provided with a third rotating pin 244, the other end of the swinging block 241 is provided with a slot, and the third rotating pin 244 is located in the slot of the swinging block 241.

In order to make the translation of the key more smooth, the two sides of the back of the key 4 can be convexly provided with translation limiting parts 43 extending along the length direction of the key 4, the translation limiting parts 43 penetrate through the hole positions 17 formed in the shell 1 and then are clamped with the inner surface of the shell 1, and the translation limiting parts 43 can translate in the hole positions 17.

The customs lock 18 is installed in the customs lock installation hole 19 formed in the housing 1 and located at the other end side of the locking stop block 242, and the key 4 is provided with a customs lock hole 44 corresponding to the position of the customs lock 18.

During implementation, a fifth spring 20 can be arranged between the back of the shell 1 and the overturning seat 2, and the design of the fifth spring can enable the coded lock to automatically pop up when unlocked, so that a user does not need to manually separate the hook seat from the main body part of the coded lock.

The jack 21 can be seted up to the both sides of backplate 3, colludes the both sides of seat 5 and is equipped with the post 22 of inserting that is arranged in inserting jack 21, when last lock, inserts the post and can insert the jack of backplate to realize the correct counterpoint of the main part of trick lock and lock hook.

The working principle of the utility model is as follows:

when the password is wrong, the slot of the password wheel matching seat is staggered with the insertion block of the movable block, the insertion block of the movable block is abutted to the side wall of the password wheel matching seat, the movable block cannot translate towards the unlocking direction at the moment, the hook block of the key is hooked with the lock hook of the hook seat, due to the elastic action of the third spring, the other end of the locking stop block can be always located on the translation path of the hook block of the key, at the moment, the hook block is blocked by the locking stop block, the key cannot translate towards the unlocking direction, the hook block cannot be separated from the lock hook, and the password lock is in a locking state.

After the correct password is input, the slots of the password wheel matching seats are aligned to the insertion blocks of the movable blocks, then the first springs can drive the movable blocks to translate in the unlocking direction, the insertion blocks of the movable blocks are inserted into the slots of the password wheel matching seats corresponding to the insertion blocks respectively, the movable blocks can push the swinging blocks to swing in the translation process, the swinging blocks drive the locking stop blocks to translate in the locking direction, the other ends of the locking stop blocks exit from the translation path of the hook blocks, the user pushes the keys again at the moment, the keys can translate in the unlocking direction due to the fact that the locking stop blocks are far away from the hook blocks and the limit blocking of the hook blocks is relieved, the hook blocks are separated from the hook blocks of the hook seats, and unlocking can be achieved.

When the password needs to be reset, the password lock needs to be in an unlocking state, a user pushes the password adjusting switch from the side edge of the password lock to enable the password adjusting switch to translate along the direction vertical to the movable block and enter a translation path of the contact part of the movable block, at the moment, due to the blocking of the password adjusting switch, the password wheel matching seat cannot drive the movable block to move towards the locking direction, the user can forcibly rotate the password wheel to enable the password wheel to rotate relative to the password wheel matching seat, at the moment, the relative position of a connecting lug at the back of the password wheel and a groove of the password wheel matching seat can be changed, the relative position of the password wheel and the password wheel matching seat is changed along with the change of the connecting lug, the unlocking password can be changed, then the password adjusting switch is pushed to reset, then, the password wheel matching seat is rotated to drive the movable block to translate towards the locking direction, and the slot of the password wheel matching seat and the insertion block are staggered, the code wheel can be locked to realize code adjustment.

When the customs lock is used for unlocking, the rotary locking block 181 of the customs lock can rotate and push the locking stop dog, the other end of the locking stop dog is made to exit from the translation path of the hook block of the key so as to remove the limit blocking of the hook block, and the key is pushed again to separate the hook block from the lock hook, so that unlocking can be realized.

In summary, the utility model has the following advantages:

1. the code adjusting switch is arranged on the side edge of the coded lock, when the code is correct, a user can directly push the code adjusting switch from the outer side edge of the coded lock to adjust the code, the code adjusting switch is simple in operation, and the code adjusting operation of the user is facilitated.

2. The code adjusting switch positioning structure is arranged on the outer side of the code adjusting switch, and the shifting stress position of the code adjusting switch is arranged close to the outer side, so that the stress is better, a user can conveniently shift the code adjusting switch, and the code adjusting switch can be prevented from being blocked during shifting.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims (10)

1. The utility model provides a take side to transfer trick lock of yard switch structure which characterized in that: comprises a shell (1), a turnover seat (2), a back plate (3), a key (4), a hook seat (5), a movable block (6), a password component (7), a first spring (8), a second spring (9) and a code adjusting switch (10), wherein a lock hook (51) is arranged on the surface of the hook seat (5), one end of the shell (1) is rotatably connected with the turnover seat (2) through a rotating shaft (11), the back plate (3) is arranged at the back of the shell (1), a lock hook through hole (31) for the lock hook (51) of the hook seat (5) to pass through is arranged on the back plate (3), the movable block (6) is translatably arranged on the inner surface of the back plate (3), the password component (7) is arranged between the shell (1) and the movable block (6), the first spring (8) is arranged between the inner surface of the side wall of the shell (1) and one end part of the movable block (6), a contact part (61) is convexly arranged at one end part of the movable block (6), the code adjusting switch (10) is installed at one side in the shell (1) in a translation manner and is positioned at the side edge of the contact part (61) of the movable block (6), the outer side of the code adjusting switch (10) penetrates through a switch through hole (12) formed in the side wall of the shell (1) and then extends outwards, the code adjusting switch (10) can translate so as to move to a translation path of the contact part (61) to block the contact part (61) to enable the movable block (6) not to translate in the upward locking direction or move out from the translation path of the contact part (61) to release the limit blocking of the movable block (6), the key (4) is installed on the surface of the shell (1) in a translation manner, the second spring (9) is positioned between a first spring limit part (41) arranged on the inner surface of one end, far away from the movable block (6), of the key (4) and a second spring limit part (13) arranged on the back of the shell (1), the inner surface of the key (4) is provided with a hook block (42) which extends into the shell (1) and is used for being hooked with a lock hook (51) of the hook seat (5), and a lock core component (24) is arranged between a translation path of the hook block (42) and the movable block (6).

2. The coded lock with the side code-adjusting switch structure according to claim 1, characterized in that: the lock core assembly (24) comprises a swinging block (241), a locking stop block (242) and a third spring (243), the locking stop block (242) can be installed on the back of the shell (1) in a translation mode and located on one side of the movable block (6), the locking stop block (242) can translate along the translation direction parallel to the movable block (6), the third spring (243) is located between the inner surface of the side wall of the shell (1) and one end of the locking stop block (242), the other end of the locking stop block (242) is located on the translation path of the hook block (42) of the key (4), the swinging block (241) is located between the movable block (6) and the locking stop block (242), the middle of the swinging block (241) is rotationally connected with a second rotating pin (25) arranged on the back of the shell (1), one end of the swinging block (241) extends to one side of the movable block (6), and the other end of the swinging block (241) is connected with the locking stop block (242), the movable block (6) can push the swing block (241) to swing when translating towards the unlocking direction, so that the swing block drives the locking stop block (242) to translate, and the other end of the locking stop block (242) is withdrawn from the translation path of the hook block (42).

3. The coded lock with the side code-adjusting switch structure according to claim 2, characterized in that: the bottom of the locking stop block (242) is provided with a third rotating pin (244), the other end of the swinging block (241) is provided with a slot position, and the third rotating pin (244) is located in the slot position of the swinging block (241).

4. The coded lock with the side code-adjusting switch structure according to claim 2, characterized in that: still include customs lock (18), customs lock mounting hole (19) that are equipped with on customs lock (18) installation shell (1) in and be located the other end side of locking dog (242), set up customs lockhole (44) corresponding with the position of customs lock (18) on button (4), the rotation locking piece (181) of customs lock (18) can rotate and promote locking dog (242) translation, make the other end of locking dog (242) withdraw from the translation route of colluding block (42) of button (4) in order to relieve the spacing of colluding block (42) and block.

5. The coded lock with the side code-adjusting switch structure according to claim 1, characterized in that: password subassembly (7) include at least one password wheel (71) and at least one password wheel cooperation seat (72), the back of shell (1) is equipped with at least one first commentaries on classics round pin (14), password wheel (71) rotationally install respectively on the first commentaries on classics round pin (14) that correspond separately, password wheel hole (15) of seting up on passing shell (1) one side of password wheel (71) are outwards stretched out, password wheel cooperation seat (72) are connected respectively at password wheel (71) back that corresponds separately and can be followed password wheel (71) and rotated, all are equipped with slot (721) on the circumference lateral wall of every password wheel cooperation seat (72), movable block (6) epirelief is equipped with plug-in block (62) that can insert respectively in slot (721) of password wheel cooperation seat (72) that correspond separately.

6. The coded lock with the side code-adjusting switch structure according to claim 5, characterized in that: the back of password wheel (71) is protruding to be equipped with a plurality of hemispherical connection lug (711), annular distribution has a plurality of to supply on the top surface of password wheel cooperation seat (72) to connect lug (711) male recess (722), password wheel (71) insert in recess (722) of password wheel cooperation seat (72) through connecting lug (711) to be connected with password wheel cooperation seat (72), all be equipped with fourth spring (23) between the internal surface of every password wheel cooperation seat (72) and backplate (3), fourth spring (23) cover is located on first commentaries on classics round pin (14).

7. The coded lock with the side code-adjusting switch structure according to claim 1, characterized in that: the inner surface of the side part of the shell (1) is provided with two positioning grooves (161) which are positioned on the outer side of the code adjusting switch (10) and are arranged at intervals along the translation direction of the code adjusting switch (10), a positioning block (101) is convexly arranged on the outer side of the code adjusting switch (10), and the code adjusting switch (10) is inserted into the positioning grooves (161) through the positioning block (101) so as to realize positioning.

8. The coded lock with the side code-adjusting switch structure according to claim 1, characterized in that: the protruding spacing portion of translation (43) that is equipped with along the length direction extension of button (4) in the back both sides of button (4), the spacing portion of translation (43) pass and set up some hole site (17) on shell (1) after with the internal surface looks joint of shell (1), the spacing portion of translation (43) can be translated in hole site (17).

9. The coded lock with the side code-adjusting switch structure according to claim 1, characterized in that: and a fifth spring (20) is arranged between the back of the shell (1) and the overturning seat (2).

10. The coded lock with the side code-adjusting switch structure according to claim 1, characterized in that: jacks (21) are formed in two sides of the back plate (3), and inserting columns (22) used for being inserted into the jacks (21) are arranged on two sides of the hook seat (5).

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