CN213359656U - Connecting structure for movable end of electronic rope in intelligent electronic lock - Google Patents

Abstract

The utility model discloses a connection structure that is arranged in intelligence electronic lock electron rope expansion end. The structure includes: a drive device; a rotating member; the telescopic piece is arranged on the rotating piece, can rotate along with the rotating piece and can reciprocate along the height direction of the rotating piece, the telescopic piece and the rotating piece cannot be completely separated, and a shifting block extending outwards is arranged on the side edge of the telescopic piece; a first pressure spring; a clamping device; and a toggle device. Adopt joint groove width along the design that the card wheel circumference narrows down gradually for the outside can't pull out the electronic rope violence, simultaneously, increases drive arrangement, can be under the condition of not opening the order, and emptying toggle device makes toggle device play not to stir the effect, and the structure is ingenious, has great market competition.

Description

Connecting structure for movable end of electronic rope in intelligent electronic lock

Technical Field

The utility model relates to an intelligence electronic lock field especially relates to a connection structure that is arranged in electronic rope expansion end of intelligence electronic lock.

Background

The intelligent electronic lock is a tool to lock that is used for fields such as container, tank wagon, and the intelligent electronic lock on the market now, it all needs artifical input password to unblank generally, inputs and accomplishes the back, can carry out the operation of unblanking, nevertheless artifical unblanking has a problem, and that is exactly can't take notes who has opened the lock, and this just leads to the problem appearing, and it is very troublesome to pursue.

Moreover, the fixing modes of the two ends of the electronic rope of the existing intelligent electronic lock on the market are complex, and once the electronic rope is damaged, the whole intelligent electronic lock needs to be replaced, so that the intelligent electronic lock is quite wasteful.

Therefore, there is a need in the market for a connection structure for an active end of an electronic rope in an intelligent electronic lock that can solve one or more of the above problems.

SUMMERY OF THE UTILITY MODEL

For solving one or more problems that exist among the prior art, the utility model provides a connection structure that is arranged in electronic cable expansion end among the intelligence electronic lock.

The utility model discloses a reach the technical scheme that above-mentioned purpose adopted and be: a connection structure for an electronic rope free end in an intelligent electronic lock, the connection structure comprising:

the driving device is arranged in the intelligent electronic lock;

the rotating piece is in transmission connection with the driving device;

the telescopic piece is arranged on the rotating piece, can rotate along with the rotating piece and can reciprocate along the height direction of the rotating piece, the telescopic piece and the rotating piece cannot be completely separated, and a shifting block extending outwards is arranged on the side edge of the telescopic piece;

the first pressure spring is arranged between the rotating part and the telescopic part and applies a force for keeping the rotating part and the telescopic part away from each other to the rotating part and the telescopic part;

the clamping device is rotationally connected to the telescopic piece and can reciprocate along with the telescopic piece along the height direction of the rotating piece, and when the clamping device is pushed upwards, the clamping device is matched with the electronic rope and applies pressure to the electronic rope, so that the electronic rope cannot be pulled out; and

the shifting device is movably arranged on the shell of the intelligent electronic lock, is matched with the shifting block and is used for shifting the shifting block to move downwards, so that the clamping device is separated from the electronic rope.

In some embodiments, the clip apparatus comprises:

the clamping rod is rotatably connected to the telescopic piece;

the clamping wheel mounting seat is fixedly connected to the upper end of the clamping rod; and

the clamping wheel is rotationally connected to the clamping wheel mounting seat and applies pressure to the electronic rope when contacting the electronic rope;

a clamping groove is formed in the contact surface of the clamping wheel and the electronic rope, and the width of the clamping groove gradually narrows along the circumference of the clamping wheel;

when the clamping groove is contacted with the electronic rope, the clamping wheel rotates when the electronic rope is pulled outwards, the clamping groove in which the clamping wheel is contacted with the electronic rope is narrowed, so that the pressure between the clamping wheel and the electronic rope is increased, and the electronic rope cannot be pulled out.

In some embodiments, a second pressure spring is arranged outside the clamping rod, one end of the second pressure spring is in contact with the clamping wheel mounting bottom, and the other end of the second pressure spring is in contact with the upper end face of the telescopic piece.

In some embodiments, the rotating member is provided with a receiving groove, one end of the first pressure spring is arranged in the receiving groove, and the other end of the first pressure spring is in contact with the lower end face of the telescopic member.

In some embodiments, the telescoping member comprises:

the poking block is arranged on the side edge of the body; and

the guide post, guide post one end is fixed to be set up on the terminal surface under the body, the other end stretch into extremely rotate in the piece, and can along rotate the piece up-and-down motion, and unable with rotate the complete separation of piece.

In some embodiments, the toggle device comprises:

the poking groove is arranged on the shell of the intelligent electronic lock; and

the poking slider is provided with a poking elastic block matched with the poking groove, and the poking elastic block penetrates through the poking groove to movably connect the poking slider to the shell of the intelligent electronic lock, so that the poking slider can reciprocate along the poking groove;

after the poking elastic block extends into the shell of the intelligent electronic lock, the poking elastic block is matched with the poking block and used for applying pressure to the poking block.

In some embodiments, a return device is disposed between the toggle sliding block and the housing of the intelligent electronic lock.

In some embodiments, the reply device comprises:

the first recovery chamber is arranged on the intelligent electronic lock shell;

the third pressure spring is arranged in the first recovery chamber;

and the return clamping block is arranged on the shifting slide block, extends into the first return cavity and is matched with the third pressure spring.

The utility model has the advantages that: the utility model discloses a joint groove width along the design that the card wheel circumference narrows down gradually for the outside can't pull out the electronic rope violence, simultaneously, increases drive arrangement, can be under the condition that does not open the order, unloading toggle device for toggle device can not play the effect of stirring, and the structure is ingenious, has great market competition.

Drawings

Fig. 1 is a schematic structural view of an intelligent electronic lock with a two-dimensional code unlocking function according to a preferred embodiment of the present invention;

fig. 2 is a schematic view of a connection structure of a movable end in an intelligent electronic lock with a two-dimensional code unlocking function according to a preferred embodiment of the present invention;

fig. 3 is a schematic view of a local connection between a movable end connection structure and an electronic lock case in the intelligent electronic lock with the two-dimensional code unlocking function according to the preferred embodiment of the present invention;

fig. 4 is a schematic structural view of a toggle slider in a movable end connection structure of an intelligent electronic lock with a two-dimensional code unlocking function according to a preferred embodiment of the present invention;

fig. 5 is a sectional view of the toggle device in the connection of the movable end of the intelligent electronic lock with the two-dimensional code unlocking function according to the preferred embodiment of the present invention;

fig. 6 is a schematic structural view of a fixing cavity in a fixed end connection structure of an intelligent electronic lock with a two-dimensional code unlocking function according to a preferred embodiment of the present invention;

fig. 7 is the schematic structural diagram of another angle of the fixed cavity in the fixed end connection structure of the intelligent electronic lock with the two-dimensional code unlocking function according to the preferred embodiment of the present invention

Fig. 8 is a schematic structural view of a fixed end connection structure in an intelligent electronic lock with a two-dimensional code unlocking function according to a preferred embodiment of the present invention;

fig. 9 is a schematic structural view of a connection state between a fixed end connection structure and an electronic rope in an intelligent electronic lock with a two-dimensional code unlocking function according to a preferred embodiment of the present invention;

fig. 10 is a schematic block diagram of an intelligent electronic lock with a two-dimensional code unlocking function according to a preferred embodiment of the present invention.

Detailed Description

In order to make the above objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

As shown in fig. 1-10, the utility model discloses an intelligence electronic lock with two-dimensional code function of unblanking, intelligence electronic lock includes:

an electronic lock housing 100;

the wireless communication module 200 is arranged in the electronic lock shell 100, and is used for wireless communication of data;

the infrared inductor 300 is arranged on the electronic lock shell 100, and is used for sensing an infrared signal;

the display screen 400 is arranged on the electronic lock shell 100 and used for displaying the two-dimensional code;

the processor 500 is connected with the wireless communication module 200, the infrared sensor 300 and the display screen 400, and is used for receiving and sending signals; and

an electronic rope 600, wherein the electronic rope 600 is arranged on the electronic lock housing 100 and is connected with the processor 500;

one end of the electronic rope 600 is connected with the electronic lock housing 100 through the fixed end connecting structure 700, and the other end is connected with the electronic lock housing 100 through the movable end connecting structure 800;

specifically, this scheme adopts infrared inductor 300's design, when needs are unblanked, only need rock the palm before infrared inductor 300, can awaken up display screen 400, a two-dimensional code can appear on display screen 400 promptly, when sweeping the sign indicating number, need download one rather than the app that corresponds, sweep the sign indicating number to the two-dimensional code through this app, sweep the sign indicating number back, the operation of unblanking in app, if sweep a sign indicating number people no authority, can't unblank promptly, if there is the authority, in case unblank the back, the backstage can be to unblanking people's information recording, and simultaneously, upload to server 900 and file this record through wireless communication module 200.

It should be noted that, even if there is no network, the lock can be unlocked when scanning the code, the app stores the information of the person who unlocks in the mobile phone, and when the person goes to a place with a network, the information can be sent to the server 900 to be filed, that is, the offline unlocking is realized.

It should be noted that the electronic lock also has a cutting-off prevention function, and when the electronic rope 600 is cut off, a signal of cutting off by violence can be transmitted to the server 900 through the wireless communication module 200, and the server 900 can know the latest information. For the structure of the electronic rope 600, reference may be made to the utility model patent with patent number 201921303979.4, named as an electronic locking rope and an electronic seal using the electronic locking rope, so the structure of the electronic rope 600 is not described herein.

The movable end connection structure 800 includes:

the driving device 801 is arranged in the intelligent electronic lock;

the rotating piece 802 is in transmission connection with the driving device 801;

the telescopic piece 803 is arranged on the rotating piece 802, can rotate along with the rotating piece 802, can do reciprocating motion along the height direction of the rotating piece 802, cannot be completely separated from the rotating piece 802, and is provided with an outward extending shifting block 8031 on the side edge of the telescopic piece 803;

a first compression spring 804, the first compression spring 804 being disposed between the rotating member 802 and the telescopic member 803, and applying a force to the rotating member 802 and the telescopic member 803 to separate the rotating member 802 and the telescopic member 803;

the clamping device 805 is rotatably connected to the telescopic member 803, can reciprocate along with the telescopic member 803 in the height direction of the rotating member 802, and when the clamping device 805 is pushed upwards, the clamping device cooperates with the electronic rope 600 to apply a pressure to the electronic rope 600, so that the electronic rope 600 cannot be pulled out; and

a toggle device 806, the toggle device 806 is movably disposed on the smart electronic lock housing 100, and is engaged with the toggle block 8031, and is configured to toggle the toggle block 8031 to move downward, so that the latch 805 is separated from the electronic rope 600.

Specifically, after the intelligent electronic lock is locked, the driving device 801 (motor) works to drive the rotating member 802 to rotate, so as to drive the telescopic member 803 to rotate, so that the toggle block 8031 on the telescopic member 803 is separated from the toggle device 806, that is, when the toggle device 806 is toggled outside the housing, a pressure cannot be applied to the toggle block 8031, so that the function of the toggle device 806 fails.

The design greatly improves the safety of the lockset and avoids the problem that anyone can unlock at will.

Meanwhile, when the lock needs to be unlocked, the processor 500 controls the driving device 801 connected with the processor to work only by scanning the two-dimensional code and obtaining corresponding authority authentication, so that the toggle block 8031 is matched with the toggle device 806, and at the moment, the toggle device 806 is slightly pressed down to separate the clamping device 805 from the electronic rope 600, so that one end of the electronic rope 600 can be pulled out, and the lock is unlocked.

In some embodiments, the clamping device 805 comprises:

the clamping rod 8051 is connected to the telescopic piece 803 in a rotating mode;

the clamping wheel mounting seat 8052 is fixedly connected to the upper end of the clamping rod 8051; and

the clamping wheel 8053 is rotatably connected to the clamping wheel mounting seat 8052, and when the clamping wheel 8053 is in contact with the electronic rope 600, a pressure is applied to the electronic rope 600;

a clamping groove 80531 is formed in the contact surface of the clamping wheel 8053 and the electronic rope 600, and the width of the clamping groove 80531 is gradually narrowed along the circumference of the clamping wheel 8053;

when the electronic rope 600 is pulled outward after the catching groove 80531 contacts the electronic rope 600, the catching wheel 8053 rotates, the catching groove 80531 where the catching wheel contacts the electronic rope 600 becomes narrow, so that the pressure between the catching wheel and the electronic rope 600 becomes large, and the electronic rope 600 cannot be pulled out.

Specifically, in the scheme, the clamping groove 80531 is designed to be gradually narrowed along the circumference of the clamping wheel 8053, when the electronic rope 600 is violently pulled outside, the rope slowly moves outwards, the clamping wheel 8053 correspondingly rotates under the driving of the electronic rope 600, and in the rotating process, because the clamping groove 80531 is gradually narrowed, the two sides of the clamping groove 80531 can gradually continue to apply pressure to the electronic rope 600, so that the pressure applied to the electronic rope 600 is increased, the electronic rope 600 is more and more tensioned, and the problem of violence pulling is avoided.

In some embodiments, a second compression spring 8054 is disposed outside the clamping rod 8051, and one end of the second compression spring 8054 contacts with the bottom of the clamping wheel mounting seat 8052, and the other end contacts with the upper end face of the telescopic member 803.

Specifically, since the clamping rod 8051 is rotatably connected to the telescopic member 803, when the clamping wheel 8053 of the intelligent electronic lock is not locked in contact with the electronic rope 600, it may rotate left and right, which may cause deviation between the clamping wheel 8053 and the electronic rope 600, which may result in a problem of a firm clamping portion.

In the scheme, the second pressure spring 8054 is arranged between the clamping rod 8051 and the bottom of the clamping ring mounting seat, and an outward thrust is arranged between the second pressure spring 8054 and the clamping rod 8051 through the second pressure spring 8054, so that the clamping rod 8051 cannot rotate in a normal shaking state, and the problem of position deviation of the clamping wheel 8053 and the electronic rope 600 is solved.

In some embodiments, the rotating member 802 is provided with a receiving groove 8021, and one end of the first compression spring 804 is disposed in the receiving groove 8021, and the other end thereof contacts with a lower end surface of the telescopic member 803.

In some embodiments, the telescoping member 803 comprises:

the body 8032, the toggle block 8031 is arranged on the side edge of the body 8032; and

guide post 8033, guide post 8033 one end is fixed to be set up on the terminal surface under the body 8032, the other end stretch into to rotate in the piece 802, and can along rotate piece 802 up-and-down motion, and can't with rotate the piece 802 and separate completely.

In some embodiments, the toggle 806 comprises:

the toggle groove 8061, the toggle groove 8061 is arranged on the intelligent electronic lock housing 100; and

a toggle sliding block 8062, a toggle elastic block 80621 matched with the toggle groove 8061 is arranged on the toggle sliding block 8062, the toggle elastic block 80621 penetrates through the toggle groove 8061 to movably connect the toggle sliding block 8062 to the intelligent electronic lock housing 100, so that the toggle sliding block 8062 can reciprocate along the toggle groove 8061;

after the poking elastic block 80621 extends into the intelligent electronic lock shell 100, the poking elastic block 80621 is matched with the poking block 8031 and used for applying pressure to the poking block 8031.

Specifically, the toggle elastic block 80621 is a buckle, which can pass through the toggle groove 8061 after being extruded and deformed, and returns to the original shape after passing through the toggle groove 8061, so that the toggle sliding block 8062 is fixed in the toggle groove 8061 in a clamping manner.

In some embodiments, a return device 8063 is disposed between the toggle sliding block 8062 and the intelligent electronic lock housing 100.

In some embodiments, the return device 8063 includes:

a first recovery chamber 80631, the first recovery chamber 80631 being disposed on the smart electronic lock housing 100;

a third compression spring 80632, the third compression spring 80632 disposed within the first return chamber 80631;

and the recovery clamping block 80633 is arranged on the toggle sliding block 8062, extends into the first recovery chamber 80631 and is matched with the third pressure spring 80632.

In some embodiments, the fixed end connection structure 700 includes:

the fixing cavity 701 is arranged on the intelligent electronic lock shell 100, and a fixing card interface 7011 and a positive and negative connecting contact 7012 electrically connected with the inside of the intelligent electronic lock are arranged in the fixing cavity 701;

the upper end of the positive electrode connecting part 702 is provided with a positive electrode connecting through hole 7021 for the electronic rope 600 to be inserted into, the side wall of the positive electrode connecting part 702 is provided with a positive electrode connecting groove (not marked in the figure) matched with the positive electrode connecting contact 7012, and the inner side wall of the positive electrode connecting through hole 7021 is electrically connected with the positive electrode connecting groove (not marked in the figure);

the negative electrode connecting part 703 is arranged at the lower end of the positive electrode connecting part 702 and is insulated from the positive electrode connecting part 702, a negative electrode connecting through hole (not shown) for inserting the electronic rope 600 is formed in the negative electrode connecting part 703, a negative electrode connecting groove (not shown) matched with the positive and negative connecting contacts 7012 is formed in the side wall of the negative electrode connecting through hole (not shown), the inner side wall of the negative electrode connecting through hole (not shown) is insulated from the negative electrode connecting groove (not shown), and the bottom of the negative electrode connecting through hole (not shown) is electrically connected with the negative electrode connecting groove (not shown); and

the fixing clamping part 704 is arranged at the lower end of the negative electrode connecting part 703, and an elastic fixing clamping hook 7041 matched with the fixing clamping interface 7011 is arranged on the fixing clamping part 704;

the electronic rope 600 is fixed in the positive connecting through hole 7021 and the negative connecting through hole (not marked in the figure), the outer side wall of the electronic rope 600 is electrically connected with the positive connecting through hole 7021, the outer side wall of the electronic rope 600 is in insulated connection with the negative connecting through hole (not marked in the figure), and the inner core of the electronic rope 600 is electrically connected with the bottom of the negative connecting through hole (not marked in the figure);

a first fixing chamber opening 7013 through which the positive electrode connecting part 702, the negative electrode connecting part 703 and the fixing clamping part 704 can pass is formed in the lower end of the fixing chamber 701, and a second fixing chamber opening 7014 through which the positive electrode connecting part 702, the negative electrode connecting part 703 and the fixing clamping part 704 cannot pass is formed in the upper end of the fixing chamber 701;

the second fixed chamber opening 7014 allows the electronic cord 600 to pass through.

Specifically, in this embodiment, the electronic rope 600 is inserted into the positive electrode connecting through hole 7021 and the negative electrode connecting through hole (not shown), the outer conductive rope is electrically connected and fixed to the inner side wall of the positive electrode connecting through hole 7021, and the inner core of the electronic rope 600 is electrically connected and fixed to the bottom of the negative electrode connecting through hole (not shown).

After electronic rope 600 is cut off by violence, the return circuit is interrupted, can carry out automatic alarm through this tool to lock, and concrete principle still refers to the utility model patent of the electron facing slip that the patent name is an electronic lock rope and uses this electronic lock rope, no longer gives unnecessary details here.

In some embodiments, the positive connection portion 702 and the negative connection portion 703 are respectively provided with a first waterproof ring 705 and a second waterproof ring 706, and the positive connection groove (not shown) and the negative connection groove (not shown) are located between the first waterproof ring 705 and the second waterproof ring 706.

Specifically, the first waterproof ring 705 and the second waterproof ring 706 are designed, so that the problem of short circuit caused by wetting or water inflow is greatly avoided.

In summary, the intelligent electronic lock includes an electronic lock housing 100; a wireless communication module 200; an infrared sensor 300; the display screen 400 is arranged on the electronic lock shell 100 and used for displaying the two-dimensional code; a processor 500; the electronic rope 600 is arranged on the electronic lock shell 100, and the electronic rope 600 is connected with the processor 500; the electronic rope 600 is connected to the electronic lock housing 100 through the fixed end connection structure 700 at one end, and connected to the electronic lock housing 100 through the movable end connection structure 800 at the other end. The utility model discloses a two-dimensional code is unblanked, when needs are unblanked, only need sweep the sign indicating number and can unblank, is sweeping the in-process of sign indicating number moreover, can take notes the information of the people of unblanking, in case go wrong, it is just fairly convenient to pursue the responsibility, moreover, the design of the stiff end connection structure 700 of this scheme for when electronic rope 600 appears damaging, can conveniently change electronic rope 600, can not cause the problem that needs to change whole lock.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (8)

1. A connection structure for an electronic rope movable end in an intelligent electronic lock, characterized in that the connection structure comprises:

the driving device is arranged in the intelligent electronic lock;

the rotating piece is in transmission connection with the driving device;

the telescopic piece is arranged on the rotating piece, can rotate along with the rotating piece and can reciprocate along the height direction of the rotating piece, the telescopic piece and the rotating piece cannot be completely separated, and a shifting block extending outwards is arranged on the side edge of the telescopic piece;

the first pressure spring is arranged between the rotating part and the telescopic part and applies a force for keeping the rotating part and the telescopic part away from each other to the rotating part and the telescopic part;

the clamping device is rotationally connected to the telescopic piece and can reciprocate along with the telescopic piece along the height direction of the rotating piece, and when the clamping device is pushed upwards, the clamping device is matched with the electronic rope and applies pressure to the electronic rope, so that the electronic rope cannot be pulled out; and

the shifting device is movably arranged on the shell of the intelligent electronic lock, is matched with the shifting block and is used for shifting the shifting block to move downwards, so that the clamping device is separated from the electronic rope.

2. The connecting structure for the movable end of an electronic rope in an intelligent electronic lock as recited in claim 1, wherein said clamping device comprises:

the clamping rod is rotatably connected to the telescopic piece;

the clamping wheel mounting seat is fixedly connected to the upper end of the clamping rod; and

the clamping wheel is rotationally connected to the clamping wheel mounting seat and applies pressure to the electronic rope when contacting the electronic rope;

a clamping groove is formed in the contact surface of the clamping wheel and the electronic rope, and the width of the clamping groove gradually narrows along the circumference of the clamping wheel;

when the clamping groove is contacted with the electronic rope, the clamping wheel rotates when the electronic rope is pulled outwards, the clamping groove in which the clamping wheel is contacted with the electronic rope is narrowed, so that the pressure between the clamping wheel and the electronic rope is increased, and the electronic rope cannot be pulled out.

3. The connecting structure for the movable end of the electronic rope in the intelligent electronic lock according to claim 2, wherein a second pressure spring is arranged outside the clamping rod, one end of the second pressure spring is in contact with the bottom of the clamping wheel, and the other end of the second pressure spring is in contact with the upper end face of the telescopic piece.

4. The connecting structure of claim 1, wherein the rotating member has a receiving groove, and the first pressing spring has one end disposed in the receiving groove and the other end contacting with the lower end surface of the telescopic member.

5. A connection structure for an electric rope movable end in an intelligent electric lock, according to claim 1, wherein said telescopic member comprises:

the poking block is arranged on the side edge of the body; and

the guide post, guide post one end is fixed to be set up on the terminal surface under the body, the other end stretch into extremely rotate in the piece, and can along rotate the piece up-and-down motion, and unable with rotate the complete separation of piece.

6. The connecting structure for the movable end of an electronic rope in an intelligent electronic lock as recited in claim 1, wherein said toggle device comprises:

the poking groove is arranged on the shell of the intelligent electronic lock; and

the poking slider is provided with a poking elastic block matched with the poking groove, and the poking elastic block penetrates through the poking groove to movably connect the poking slider to the shell of the intelligent electronic lock, so that the poking slider can reciprocate along the poking groove;

after the poking elastic block extends into the shell of the intelligent electronic lock, the poking elastic block is matched with the poking block and used for applying pressure to the poking block.

7. The connecting structure for the movable end of the electronic rope in the intelligent electronic lock as recited in claim 6, wherein a restoring device is disposed between the toggle sliding block and the housing of the intelligent electronic lock.

8. The connecting structure for the movable end of an electronic rope in an intelligent electronic lock as recited in claim 7, wherein said restoring means comprises:

the first recovery chamber is arranged on the intelligent electronic lock shell;

the third pressure spring is arranged in the first recovery chamber;

and the return clamping block is arranged on the shifting slide block, extends into the first return cavity and is matched with the third pressure spring.

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