Bullet lock with torsion spring and key thereof

Abstract

The bullet lock with the torsion spring comprises a lock cylinder and the key, the lock cylinder is provided with a lock hole allowing the key to be inserted, the lock cylinder comprises a lock shell, a lock container, a plurality of lock plates, a suspension spring, a rear cover and the torsion spring, the lock container is rotatably installed in the lock shell and provided with an axial containing cavity, and the suspension spring is arranged in the containing cavity. A containing cavity is formed in the lock cylinder, a plurality of lock plates are stacked and distributed in the containing cavity in the axial direction of the lock cylinder, a rear opening is formed in the rear end of the containing cavity, a rear cover is arranged at the rear opening and arranged in the lock shell through a torsion spring, and each lock plate is suspended above the rear cover through a suspension spring. The inner wall face of the lock shell is provided with a sliding groove allowing the lock plates to axially slide in the lock shell and a lock plate groove allowing the lock plates to circumferentially rotate in the lock shell, the lock plate groove penetrates through the inner wall face and the outer wall face of the lock shell, one end of the lock plate groove is communicated with the sliding groove, and the other end of the lock plate groove is provided with a return self-locking clamping position.

Description

Technical Field

[0001] The utility model relates to the field of bullet lock cores, in particular to a bullet lock with a torsion spring and a key thereof. Background Art

[0002] Existing public documents disclose CN210508678U, a disc-type lock cylinder, comprising a lock core sleeve. An elastic member and three locking discs are sequentially placed in the inner cavity of the lock core sleeve. The three locking discs are stacked along the axial direction of the lock core sleeve and arranged in sequence as a first locking disc, a second locking disc, and a third locking disc from the rear end opening of the lock core sleeve to the key entry. The inner diameter of the center hole increases from the first locking disc to the third locking disc. The first locking disc extends from the periphery of the locking disc and bends toward the rear end opening to form a positioning lug. The inner wall of the lock core sleeve is provided with two limiting grooves, and the positioning lugs are placed in the limiting grooves to prevent the key from accidentally pushing and turning over. This lock core does not have the function of automatically resetting the key when it is opened. It does not automatically eject after the key is turned, making it inconvenient to use. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a bullet lock with a torsion spring and a key thereof.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical solution: the utility model relates to a bullet lock with a torsion spring and a key thereof, comprising a lock core and a key, the lock core having a lock hole for inserting the key, the lock core comprising a lock shell, a lock core, a plurality of lock plates, a suspension spring, a back cover and a torsion spring, the lock core being rotatably installed in the lock shell, the lock core having an axial accommodating cavity, a plurality of lock plates being stacked and arranged in the accommodating cavity along the axial direction of the lock core, the rear end of the accommodating cavity having a rear opening, a back cover being provided at the rear opening, the back cover being arranged in the lock shell through the torsion spring, each lock plate being suspended above the back cover by the suspension spring, the inner wall surface of the lock shell being provided with a sliding groove for allowing the plurality of lock plates to slide axially in the lock shell and a locking plate groove for allowing the lock plates to rotate circumferentially in the lock shell, the locking plate groove penetrating the inner and outer wall surfaces of the lock shell, one end of the locking plate groove being connected to the sliding groove, and the other end of one of the locking plate grooves being provided with a return self-locking position. The number of locking plates corresponds to the number of locking plate slots. The return self-locking function can be achieved by setting a return self-locking position in one of the locking plate slots, or the locking plate slots corresponding to each locking plate are also provided with a return self-locking position. When one of the locking plates is located in the return self-locking position of the corresponding locking plate slot, the suspension spring stops the locking plate in the return self-locking position.

[0005] The present invention relates to a bullet lock with a torsion spring and its key. When the key is used, the lock cylinder is twisted to the angle at which the bullet lock is opened. The key pushes the locking plate into the locking plate slot through the sliding groove. The locking plate rotates circumferentially along the locking plate slot, driving the rear cover to rotate synchronously. After the rear cover rotates to the open position, the lock is triggered to open. After the torsion of the key is released, the key returns to the original position due to the action of the torsion spring, allowing the key to be removed. The inventors have found that if the locking plate slot does not have a return self-locking latch, the return spring can automatically drive the locking plate to the locked position after unlocking, and the suspension spring pushes out the key, causing the key and lock cylinder to separate. The serial numbers no longer correspond, requiring re-assignment, resulting in a large waste of manpower and material resources. This troublesome process is repeated at each workstation, causing great inconvenience in installation and transportation. Therefore, the inventors have provided the locking plate slot with a return self-locking latch. Before removing the key, the key needs to be pushed back into the lock hole. The key then re-enters the locking plate slot and is ejected out of the lock hole through the sliding groove, driven by the suspension spring and the locking plate. Add a return self-locking position so that the key will be temporarily locked in the unlocked state after unlocking and the key will not be ejected. You need to take out the key, push the key forward to return to the locked state, and then eject the key.

[0006] Preferably, the locking plate groove is provided with an inclined surface to ensure that the locking plate can smoothly return to the locking plate groove from the return self-locking position after the key is pushed toward the lock hole.

[0007] Preferably, the torsion spring includes a fixed portion and a rebound portion, the fixed portion is fixed on the lock housing, and the rebound portion is sleeved on the trigger rod of the back cover.

[0008] Preferably, each of the locking plate grooves is distributed along the axial spacing of the lock housing.

[0009] Preferably, the lock core further includes a limiting ring, which is fixed on the lock housing and is located between the back cover and the torsion spring.

[0010] Preferably, a limiting mounting hole is provided on the lock housing, and the limiting ring is installed in the limiting mounting hole.

[0011] Preferably, a torsion spring installation position is provided on one side of the position-limiting installation hole close to the rear end opening of the lock housing, and the fixing portion is fixed in the torsion spring installation position.

[0012] The beneficial effects of the present invention are as follows: the present invention relates to a bullet lock with a torsion spring, in which a return self-locking position for temporarily locking the key is provided on one side of the lock plate slot. When the key is inserted into the lock cylinder, the key pushes the lock plate to move along the slide slot to align with the corresponding lock plate slot, and then the key is turned to make the lock plate enter the lock plate slot, and the lock plate drives the lock core and the back cover to rotate synchronously. When the lock plate rotates to the return self-locking position and is aligned, the suspension spring pushes the lock plate into the return self-locking position, thereby locking the position of the lock plate and preventing the lock plate from rebounding and resetting due to the elastic potential energy of the torsion spring, so that the key will not pop out automatically, and the key and the lock cylinder are not separated, avoiding the problem of re-matching the key and the lock cylinder, thereby reducing the waste of manpower and material resources and improving the efficiency of installation and transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model after the lock core and the key are separated.

[0014] Figure 2 It is a schematic diagram of the exploded structure of the lock core of the utility model.

[0015] Figure 3 It is a structural schematic diagram of the lock housing of the utility model.

[0016] Figure 4 This is a structural schematic diagram of the lock housing of the utility model from another angle.

[0017] Figure 5 It is a structural diagram of the lock core of the utility model.

[0018] Figure 6 It is a structural schematic diagram of the locking piece of the utility model.

[0019] Figure 7 It is a structural schematic diagram of the torsion spring of the utility model.

[0020] Figure 8 It is a schematic diagram of the overall structure of the lock core of the utility model.

[0021] Figure 9 It is a partial cross-sectional schematic diagram of the utility model after the key is inserted into the lock cylinder.

[0022] Figure 10 It is a schematic diagram of the utility model after the key is inserted into the lock cylinder.

[0023] Figure 11 It is a schematic diagram of the structure of the utility model after the key is rotated.

[0024] Reference numerals

[0025] 1. Lock cylinder; 11. Lock housing; 111. Key entry; 112. Slide groove; 113. Lock plate groove; 1131. Inclined surface; 114. Return and self-locking position; 115. Limit mounting hole; 116. Torsion spring mounting position; 12. Lock core; 121. Keyhole; 122. Slide plate groove; 123. Spring groove; 124. Accommodation cavity; 13. Lock plate; 131. Lock plate hole; 132. Spring mounting block; 133. Slide plate; 14. Suspension spring; 15. Limit ring; 16. Back cover; 161. Trigger lever; 17. Torsion spring; 171. Fixing part; 172. Rebound part; 2. Key. DETAILED DESCRIPTION

[0026] See also Figure 1-11 As shown, the present invention relates to a bullet lock with a torsion spring, comprising a lock cylinder 1 and a key 2, which can be inserted into the lock cylinder 1 for engagement. The lock cylinder 1 comprises a lock housing 11, a lock core 12, a plurality of locking plates 13, a suspension spring 14, a retaining ring 15, a rear cover 16, and a torsion spring 17. The lock housing 11 has a hollow structure with open front and rear ends, and a key entry 111 is provided at the front end of the lock housing 11, communicating with the hollow structure. The inner wall of the lock housing 11 is provided with a slide groove 112 and a plurality of locking plate grooves 113. The slide groove 112 is provided along the length of the inner wall of the lock housing 11. The locking plate grooves 113 are annularly provided on the inner wall, and each locking plate groove 113 is distributed along the axial spacing of the lock housing 11. One end of each locking plate groove 113 is connected to the slide groove 112. The other end of each locking plate groove 113 is provided with a return self-locking position 114 for locking the key 2. The locking plate groove 113 is provided with an inclined surface 1131 near the return self-locking position 114. The lock core 12 is rotatably mounted within the lock housing 11. The lock core 12 is provided with a keyhole 121 aligned with the key entrance 111. A plurality of locking plates 13 are installed within the lock core 12. The rear cover 16 is mounted at the rear opening of the lock core 12. Each locking plate 13 is suspended within the accommodating cavity 124 and above the rear cover 16 by a suspension spring 14. The rear cover 16 is provided with a trigger rod 161. The torsion spring 17 includes a fixed portion 171 and a rebound portion 172. The fixed portion 171 is fixed to the opening of the lock housing 11, and the rebound portion 172 is sleeved on the trigger rod 161. A retaining ring 15 is provided between the rear cover 16 and the torsion spring 17. The retaining ring 15 is fixed to the lock housing 11.

[0027] In this embodiment, the lock core 12 has a housing 124 for the sliding movement of the locking plate 13. The locking plate 13 is slidably mounted within the housing 124. A pair of sliding plate slots 122 are provided on either side of the housing 124. The lock core 12 is internally provided with a plurality of spring slots 123, which are arranged on the inner wall of the lock core 12 along its length. The suspension spring 14 is disposed within the spring slots 123.

[0028] Wherein, each of the lock piece 13 is provided with a lock piece hole 131 for the key 2 to pass through, and a pair of spring mounting blocks 132 and a pair of sliding pieces 133 are provided on the circumference of each of the lock piece 13. When the lock piece 13 is installed inside the lock cylinder 12, the lock piece hole 131 is aligned with the key hole 121, the spring mounting blocks 132 are respectively matched with the floating springs 14 arranged in the spring grooves 123, and the sliding pieces 133 are respectively arranged in the sliding piece grooves 122, the sliding pieces 133 are higher than the sliding piece grooves 122 and protrude out of the outer surface of the lock cylinder 12 into the sliding groove 112.

[0029] When the key 2 of the pair is inserted into the lock cylinder 1, the key 2 pushes the lock piece 13 to move along the sliding groove 112 to align with the corresponding lock piece groove 113, and then rotates the key 2 to make the lock piece 13 enter the lock piece groove 113, the lock piece 13 drives the lock cylinder 12 and the back cover 16 to rotate synchronously, when the lock piece 13 rotates to align with the reset self-locking stop 114, the floating spring 14 pushes the lock piece 13 into the reset self-locking stop 114, thereby locking the position of the lock piece 13, preventing the lock piece 13 from bouncing back to the original position due to the elastic potential of the torsion spring 17, and realizing that the key 2 is not separated from the lock cylinder 1. When the key 2 needs to be taken out, the key 2 is only needed to be pushed forward to make the lock piece 13 leave the reset self-locking stop 114 and enter the lock piece groove 113, at this time, the back cover 16 is driven to rotate to the reset position due to the elastic potential of the torsion spring 17, the back cover 16 synchronously drives the lock cylinder 12 to drive the lock piece 13 to reset, so that the lock piece 13 rotates back to the sliding groove 112, and the floating spring 14 pushes the lock piece 13 to the initial position, so that the key 2 is ejected.

[0030] Further, the lock shell 11 is provided with a limiting mounting hole 115, the limiting mounting hole 115 is arranged at the opening of the rear end of the lock shell 11, and the limiting ring 15 is mounted in the limiting mounting hole 115. Wherein, the limiting mounting hole 115 is provided with a torsion spring mounting stop 116 on the side close to the opening of the lock shell 11, and the fixed part 171 of the torsion spring 17 is fixedly mounted in the torsion spring mounting stop 116.

[0031] Further, the trigger rod 161 of the back cover 16 is in the shape of a rectangular solid, the rebound part 172 of the torsion spring 17 is a rectangle matched with the trigger rod 161, and the rebound part 172 is sleeved on the trigger rod 161. When the back cover 16 rotates, the rebound part 172 will be stretched and deformed under stress, and at the same time store elastic potential. When the rotating force disappears, the rebound part 172 releases the elastic potential to make the back cover 16 return to the initial position.

[0032] The utility model relates to a bullet lock with a torsion spring. In the utility model, a return self-locking position 114 for temporarily locking the key 2 is provided on one side of the lock plate groove 113. When the key 2 is inserted into the lock cylinder 1, the key 2 pushes the lock plate 13 along the slide groove 112 to align with the corresponding lock plate groove 113. Then, the key 2 is rotated to make the lock plate 13 enter the lock plate groove 113. The lock plate 13 drives the lock core 12 and the back cover 16 to rotate synchronously. When the lock plate 13 rotates to align with the return self-locking position 114, the suspension spring 14 pushes the lock plate 13 into the return self-locking position 114, thereby locking the position of the lock plate 13 and preventing the lock plate 13 from rebounding and resetting due to the elastic potential energy of the torsion spring 17, so that the key 2 will not pop out automatically, thereby realizing that the key 2 and the lock cylinder 1 are not separated, avoiding the problem of re-matching the key 2 and the lock cylinder 1, thereby reducing the waste of manpower and material resources and improving the efficiency of installation and transportation.

[0033] The above implementation mode is only a description of the preferred implementation mode of the present invention, and does not limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solution of the present invention by ordinary engineering and technical personnel in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A bullet lock with a torsion spring and a key thereof, comprising a lock core and a key, wherein the lock core has a lock hole for inserting the key, and is characterized in that: The lock core includes a lock shell, a lock core, several lock plates, a suspension spring, a back cover and a torsion spring. The lock core can be rotatably installed in the lock shell. The lock core has an axial accommodating cavity. Several lock plates are stacked in the accommodating cavity along the axial direction of the lock core. The rear end of the accommodating cavity has a rear opening. A back cover is provided at the rear opening. The back cover is arranged in the lock shell through a torsion spring. Each lock plate is suspended above the back cover by a suspension spring. The inner wall surface of the lock shell is provided with a slide groove for multiple lock plates to slide axially in the lock shell and a lock plate groove for the lock plate to rotate circumferentially in the lock shell. The lock plate groove passes through the inner and outer wall surfaces of the lock shell. One end of the lock plate groove is connected to the slide groove, and the other end of the lock plate groove is provided with a return self-locking position.

2. A bullet lock with a torsion spring and a key thereof according to claim 1, characterized in that: The return self-locking position is located behind the lock plate slot in the direction of key insertion into the lock core.

3. The bullet lock with a torsion spring and its key according to claim 1, characterized in that: The locking plate groove is provided with an inclined surface at one end close to the return self-locking position.

4. The bullet lock with a torsion spring and its key according to claim 1, characterized in that: The back cover is provided with a trigger rod, and the torsion spring includes a fixed portion and a rebound portion, the fixed portion is fixed on the lock housing, and the rebound portion is sleeved on the trigger rod.

5. The bullet lock with a torsion spring and its key according to claim 1, characterized in that: Each of the locking plate grooves is distributed along the axial spacing of the lock housing.

6. The bullet lock with a torsion spring and its key according to claim 1, characterized in that: The lock core also includes a limiting ring, which is fixed on the lock housing and is located between the back cover and the torsion spring.

7. The bullet lock with a torsion spring and its key according to claim 6, characterized in that: The lock housing is provided with a limiting mounting hole, and the limiting ring is installed in the limiting mounting hole.

8. The bullet lock with a torsion spring and its key according to claim 7, characterized in that: A torsion spring installation position is provided on one side of the position-limiting installation hole close to the rear end opening of the lock housing, and the torsion spring is fixed in the torsion spring installation position.

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