Self-releasing latch lock

Abstract

The utility model provides a kind of self-ejecting bolt lock, including shell, trigger tongue, positioning member and bolt rod, the inner wall of shell is equipped with avoiding slot;Trigger tongue is movably arranged in shell along the axial direction of shell, and it can extend relative to shell or be retracted relative to door frame, trigger tongue is equipped with the through hole and the accommodating hole being communicated with the through hole;Positioning member is movably arranged in accommodating hole, when trigger tongue extends relative to shell, at least part of positioning member is located in the through hole, when trigger tongue is retracted relative to shell, at least part of positioning member is located in avoiding slot;Bolt rod is threaded in shell and the through hole, bolt rod can extend outside trigger tongue when at least part of positioning member is located in avoiding slot, or be stopped by positioning member when at least part of positioning member is located in the through hole.Such, self-ejecting bolt lock is set in trigger tongue by positioning member, so it is not necessary to additionally set other structure between bolt rod and trigger tongue to install trigger tongue, structure is simpler.

Description

Technical Field

[0001] This utility model relates to the field of lock technology, and more specifically, to a self-springing bolt lock. Background Technology

[0002] A double door, also known as a swing door, refers to a door with two leaves. In practical use, one door is usually closed and is only opened in specific situations, such as when moving large furniture or appliances; this is called the secondary door or the fixed door. When the fixed door is closed, the bolt of the latch lock needs to be inserted into the door frame. When the bolt is retracted, the fixed door can be opened. However, the structure of the bolt lock in this technology is complex and needs improvement. Utility Model Content

[0003] The purpose of this utility model embodiment is to provide a self-spring-loaded latch lock with a simpler structure to solve the above-mentioned problems. This utility model embodiment achieves the above objective through the following technical solutions.

[0004] This utility model provides a self-springing bolt lock, comprising:

[0005] The outer casing has an inner wall with a clearance groove.

[0006] A trigger tongue is movably disposed on the housing along the axial direction of the housing and can extend relative to the housing or retract against the door frame. The trigger tongue is provided with a through hole and a receiving hole communicating with the through hole.

[0007] A positioning element, movably disposed in the receiving hole, wherein at least a portion of the positioning element is located in the through hole when the trigger tongue extends relative to the housing, and at least a portion of the positioning element is located in the clearance groove when the trigger tongue retracts relative to the housing; and

[0008] A pin rod, which passes through the housing and the through hole, is capable of extending beyond the trigger tongue when at least a portion of the positioning member is located in the recess, or being stopped by the positioning member when at least a portion of the positioning member is located in the through hole.

[0009] In one embodiment, the receiving hole is a tapered hole, and the diameter of the receiving hole gradually decreases along the direction close to the central axis of the through hole.

[0010] In one embodiment, the receiving hole has a first opening and a second opening, the first opening being formed on the inner wall of the trigger tongue and the second opening being formed on the outer wall of the trigger tongue, the positioning member being spherical, and the diameter of the positioning member being larger than the diameter of the first opening and smaller than the diameter of the second opening.

[0011] In one embodiment, there are multiple receiving holes, which are spaced apart circumferentially along the through hole, and there are multiple positioning members, which are correspondingly disposed in the multiple receiving holes.

[0012] In one embodiment, the outer shell includes a first inner circumferential surface, a second inner circumferential surface, and a third inner circumferential surface, which are sequentially connected along the direction in which the trigger tongue retracts relative to the outer shell. The inner diameter of the third inner circumferential surface is larger than the inner diameter of the first inner circumferential surface, and the second inner circumferential surface and the third inner circumferential surface form the clearance groove.

[0013] In one embodiment, the first inner circumferential surface and the third inner circumferential surface are coaxially arranged, the second inner circumferential surface is inclined relative to the first inner circumferential surface and the third inner circumferential surface, and the inner diameter of the second inner circumferential surface gradually increases along the direction in which the trigger tongue retracts relative to the outer shell.

[0014] In one embodiment, the housing includes a sleeve and a base plate connected together, the trigger tongue is movably disposed in the sleeve, the pin rod passes through the interior of the base plate and the sleeve, and the self-springing pin lock further includes an elastic element disposed in the sleeve, one end of the elastic element abutting against the base plate and the other end abutting against the trigger tongue.

[0015] In one embodiment, the trigger tongue has an annular groove at one end near the base plate, the annular groove being disposed on the outer wall of the trigger tongue, and the elastic element being sleeved on the pin rod. One end of the elastic element is disposed in the annular groove.

[0016] In one embodiment, the sleeve is provided with a groove extending axially along the outer shell, the groove being at least disposed on the inner wall of the sleeve, and the outer wall of the trigger tongue is provided with a guide protrusion, the guide protrusion being disposed in the groove and being movable along the groove.

[0017] In one embodiment, the groove extends through one end of the sleeve opposite to the base plate, and the self-springing bolt lock further includes a liner plate connected to one end of the sleeve opposite to the base plate to close the groove, the liner plate having a latch hole through which the trigger tongue passes.

[0018] This utility model provides a self-locking bolt lock comprising a housing, a trigger tongue, a positioning member, and a bolt. The inner wall of the housing has a clearance groove. The trigger tongue is movably disposed on the housing along its axial direction and can extend relative to the housing or retract against the door frame. The trigger tongue has a through hole and a receiving hole communicating with the through hole. The positioning member is movably disposed in the receiving hole. When the trigger tongue extends relative to the housing, at least a portion of the positioning member is located in the through hole; when the trigger tongue retracts relative to the housing, at least a portion of the positioning member is located in the clearance groove. The bolt passes through the housing and the through hole. The bolt can extend beyond the trigger tongue when at least a portion of the positioning member is located in the clearance groove, or be stopped by the positioning member when at least a portion of the positioning member is located in the through hole. Thus, when the trigger tongue retracts against the door frame, at least a portion of the positioning member is located in the clearance groove, and the bolt can extend beyond the trigger tongue to engage with the door frame, thereby fixing the door to the door frame. When the bolt retracts, the trigger tongue extends relative to the outer casing. At least a portion of the positioning element is located in the through hole, preventing the bolt from extending out of the outer casing and thus avoiding the bolt hitting the door frame when the door is closed. Compared to existing bolt locks, the self-springing bolt lock of this application, by placing the positioning element on the trigger tongue, eliminates the need for an additional structure between the bolt and the trigger tongue to install the trigger tongue. This simplifies the structure and reduces the cost of the self-springing bolt lock.

[0019] These or other aspects of this invention will become more apparent in the following description of the embodiments. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the self-springing bolt lock provided by this utility model when the trigger tongue extends and the bolt rod retracts.

[0022] Figure 2 yes Figure 1 A sectional view along direction II.

[0023] Figure 3 yes Figure 1 The diagram shows another structural schematic of a self-spring-loaded latch lock.

[0024] Figure 4 yes Figure 1 The diagram shows the structure of the trigger tongue of a self-springing bolt lock.

[0025] Figure 5 yes Figure 1The diagram shows the structure of a self-springing bolt lock when the trigger tongue retracts and the bolt extends.

[0026] Figure 6 yes Figure 5 A sectional view along the II-II direction. Detailed Implementation

[0027] To facilitate understanding of the embodiments of this utility model, a more comprehensive description of the embodiments of this utility model will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in the embodiments of this invention is for the purpose of describing particular implementations only and is not intended to be limiting of the invention.

[0029] Please see Figure 1 and Figure 2 This utility model provides a self-springing bolt lock 10, including a housing 11, a trigger tongue 13, a positioning element 15, and a bolt rod 16. The inner wall of the outer casing 11 is provided with a clearance groove 1121; the trigger tongue 13 is movably disposed on the outer casing 11 along the axial direction of the outer casing 11, and can extend relative to the outer casing 11 or retract against the door frame; the trigger tongue 13 is provided with a through hole 132 and a receiving hole 134 communicating with the through hole 132; the positioning member 15 is movably disposed in the receiving hole 134; when the trigger tongue 13 extends relative to the outer casing 11, at least a portion of the positioning member 15 is located in the through hole 132; when the trigger tongue 13 retracts relative to the outer casing 11, at least a portion of the positioning member 15 is located in the clearance groove 1121; the pin 16 passes through the outer casing 11 and the through hole 132; the pin 16 can extend outside the trigger tongue 13 when at least a portion of the positioning member 15 is located in the clearance groove 1121, or be stopped by the positioning member 15 when at least a portion of the positioning member 15 is located in the through hole 132.

[0030] The outer casing 11 serves as a mounting carrier for mounting the trigger tongue 13. In this embodiment, the outer casing 11 is generally a cylindrical structure with one end open and the other end closed. The clearance groove 1121 can accommodate at least a portion of the positioning member 15, so that the positioning member 15 does not obstruct the pin rod 16, thereby allowing the pin rod 16 to extend out of the outer casing 11 and engage with the door frame.

[0031] The outer casing 11 includes a first inner circumferential surface 1123, a second inner circumferential surface 1125, and a third inner circumferential surface 1127. It can be understood that the first inner circumferential surface 1123, the second inner circumferential surface 1125, and the third inner circumferential surface 1127 are all disposed on the inner wall of the outer casing 11. The first inner circumferential surface 1123, the second inner circumferential surface 1125, and the third inner circumferential surface 1127 are connected sequentially along the direction in which the trigger tongue 13 retracts relative to the outer casing 11. The inner diameter of the third inner circumferential surface 1127 is larger than the inner diameter of the first inner circumferential surface 1123, causing the third inner circumferential surface 1127 to be recessed relative to the first inner circumferential surface 1123. Thus, the second inner circumferential surface 1125 and the third inner circumferential surface 1127 form a clearance groove 1121.

[0032] The first inner circumferential surface 1123 and the third inner circumferential surface 1127 are coaxially arranged. The second inner circumferential surface 1125 is inclined relative to the first inner circumferential surface 1123 and the third inner circumferential surface 1127, and its inner diameter gradually increases along the direction in which the trigger tongue 13 retracts relative to the outer casing 11. In this way, the second inner circumferential surface 1125 can guide the movement of the positioning member 15, making the movement of the positioning member 15 smoother and facilitating the extension of the trigger tongue 13. Specifically, when the trigger tongue 13 extends, the second inner circumferential surface 1125 can abut against the positioning member 15 and guide the positioning member 15 to abut against the first inner circumferential surface 1123. Since the inner diameter of the first inner circumferential surface 1123 is smaller, when the first inner circumferential surface 1123 abuts against it, the positioning member 15 will move toward the through hole 132, so that at least a part of the positioning member 15 is located in the through hole 132, allowing the positioning member 15 to stop the pin 16 from extending from the outer casing 11. When the trigger tongue 13 retracts, the second inner circumferential surface 1125 can abut against the positioning member 15 and guide the positioning member 15 to move to be opposite the third inner circumferential surface 1127. Since the inner diameter of the third inner circumferential surface 1127 is larger, when the pin rod 16 extends, it will abut against the side of the positioning member 15 near the through hole 132, causing the positioning member 15 to move away from the through hole 132, so that at least part of the positioning member 15 is located in the relief groove 1121, thereby the pin rod 16 can extend out of the housing 11 and be fixed to the door frame.

[0033] In other embodiments, the second inner circumferential surface 1125 may also be perpendicular to the first inner circumferential surface 1123 and the third inner circumferential surface 1127. The specific configuration can be determined according to actual circumstances.

[0034] The outer casing 11 includes a sleeve 112 and a base plate 114 connected to each other. A trigger tongue 13 is movably disposed in the sleeve 112, and a pin 16 passes through the interior of the base plate 114 and the sleeve 112. A first inner circumferential surface 1123, a second inner circumferential surface 1125, and a third inner circumferential surface 1127 are all disposed in the sleeve 112, that is, a clearance groove 1121 is also disposed in the sleeve 112. The base plate 114 closes one end of the sleeve 112, and the trigger tongue 13 can extend from the other end of the sleeve 112.

[0035] Please see Figure 2 and Figure 3 The sleeve 112 is provided with a groove 1129 extending axially along the outer shell 11, and the groove 1129 is provided at least on the inner wall of the sleeve 112. The outer wall of the trigger tongue 13 is provided with a guide protrusion 136, which is disposed in the groove 1129 and can move along the groove 1129, so that the trigger tongue 13 can move axially along the outer shell 11.

[0036] In this embodiment, the groove 1129 is disposed on the inner wall and the outer wall of the sleeve 112, that is, the groove 1129 is a through groove. In other embodiments, the groove 1129 may also be disposed only on the inner wall of the sleeve 112, that is, the groove 1129 may also be a blind groove.

[0037] In this embodiment, there are two grooves 1129, which are located at both ends of the sleeve 112 in the radial direction. There are also two guide protrusions 136, each of which is located in one groove 1129, making the movement of the trigger tongue 13 smoother.

[0038] The slide groove 1129 passes through one end of the sleeve 112 away from the bottom plate 114, so that the guide protrusion 136 can move to one end of the sleeve 112 away from the bottom plate 114. That is, it increases the extension length of the trigger tongue 13, so that when the fixed door is closed, the trigger tongue 13 can more easily abut against the door frame and retract into the outer shell 11.

[0039] The trigger tongue 13 retracts into the outer shell 11 by abutting against the door frame, so that at least a portion of the positioning member 15 is located in the clearance groove 1121. The pin 16 can extend out of the trigger tongue 13 to engage with the door frame, thereby fixing the door to the door frame. Specifically, when the trigger tongue 13 retracts into the outer shell 11, the positioning member 15 provided on the trigger tongue 13 can move together with the trigger tongue 13, so that the positioning member 15 is opposite to the third inner peripheral surface 1127. When the pin 16 extends, it abuts against the side of the positioning member 15 near the through hole 132, so that the positioning member 15 moves away from the through hole 132, and at least a portion of the positioning member 15 is located in the clearance groove 1121, so that the pin 16 can extend out of the outer shell 11 and be fixed to the door frame.

[0040] Please see Figures 4 to 6In this embodiment, the receiving hole 134 is a tapered hole, and its diameter gradually decreases along the central axis direction near the through hole 132. The receiving hole 134 has a first opening 1342 and a second opening 1344. The first opening 1342 is formed on the inner wall of the trigger tongue 13, and the second opening 1344 is formed on the outer wall of the trigger tongue 13. The positioning member 15 is spherical, and its diameter is larger than the diameter of the first opening 1342 and smaller than the diameter of the second opening 1344, so that the positioning member 15 can be received in the receiving hole 134 without falling into the through hole 132 from the first opening 1342. In this embodiment, the depth of the receiving hole 134 is less than the diameter of the positioning member 15. This allows more of the positioning member 15 to be located in the through hole 132, making it easier for the positioning member 15 to stop the extension of the pin 16.

[0041] There are multiple receiving holes 134, which are spaced apart circumferentially along the through hole 132. There are also multiple positioning members 15, each corresponding to one of the multiple receiving holes 134. This ensures that when the trigger tongue 13 extends, at least a portion of each positioning member 15 is located within the through hole 132; that is, the multiple positioning members 15 stop the pin 16 circumferentially along the through hole 132, thereby better preventing the pin 16 from extending. The number of receiving holes can be two or more. In other embodiments, there may be only one receiving hole 134, which can be determined according to actual conditions.

[0042] An annular groove 138 is provided at one end of the trigger tongue 13 near the base plate 114. The annular groove 138 is provided on the outer wall of the trigger tongue 13. The annular groove 138 can be formed by the outer wall of the trigger tongue 13 recessing towards the through hole 132.

[0043] The positioning element 15 is movably disposed in the receiving hole 134 of the trigger tongue 13. Therefore, compared with the existing bolt lock, the self-spring bolt lock 10 of this application does not require an additional structure to be set between the bolt rod 16 and the trigger tongue 13 to install the trigger tongue 13. The structure is simpler, and the cost of the self-spring bolt lock 10 is also lower.

[0044] In this embodiment, the positioning element 15 is a spherical metal structure, such as a steel ball, which gives the positioning element 15 sufficient wear resistance and strength. The positioning element 15 will not easily wear or deform when abutted by the pin 16, thus having a long service life. It is understood that the positioning element 15 can also be made of other metal materials, such as stainless steel or titanium alloy.

[0045] When the trigger tongue 13 is abutted by the door frame, it retracts into the housing 11. At this time, the pin 16 extends and abuts against the side of the positioning member 15 near the through hole 132, so that at least a portion of the positioning member 15 is located in the relief groove 1121. This prevents the positioning member 15 from blocking the pin 16, allowing the pin 16 to extend out of the trigger tongue 13 and be fixed to the door frame. When the pin 16 retracts, the trigger tongue 13 extends relative to the housing 11, and at least a portion of the positioning member 15 is located in the through hole 132. This prevents the pin 16 from extending out of the housing 11 and avoids it abutting against the door frame when the door is closed.

[0046] Please see Figure 2 , Figure 4 and Figure 6 The self-spring-loaded bolt lock 10 also includes an elastic element 18, which is disposed within the sleeve 112. One end of the elastic element 18 abuts against the base plate 114, and the other end abuts against the trigger tongue 13. This allows the trigger tongue 13 to extend relative to the outer shell 11 under the action of the elastic element 18 when not abutted by the door frame, eliminating the need for manual control of the trigger tongue 13's extension and thus achieving automatic ejection of the trigger tongue 13. Specifically, when the fixed door is fixed, the trigger tongue 13 retracts into the outer shell 11, the elastic element 18 deforms, and is abutted between the outer shell 11 and the base plate 114; when the fixed door is opened, the trigger tongue 13 disengages from the door frame, and the elastic force of the elastic element 18 causes the trigger tongue 13 to extend out of the outer shell 11.

[0047] The elastic element 18 is sleeved on the pin 16, allowing the pin 16 to guide the deformation of the elastic element 18. The elastic element 18 does not bend excessively during deformation, ensuring that the direction of its elastic force is as consistent as possible with the extension direction of the trigger tongue 13, thus providing a greater elastic force to eject the trigger tongue 13. One end of the elastic element 18 is located in the annular groove 138 to prevent it from disengaging from the trigger tongue 13 during extension or retraction. In one embodiment, one end of the elastic element 18 may also be embedded in the trigger tongue 13. In this embodiment, the elastic element 18 is a spring. In other embodiments, the elastic element 18 may also be an elastic sleeve 112.

[0048] Please see Figure 3 and Figure 5 The self-locking bolt lock 10 also includes a liner 19, which is connected to the end of the sleeve 112 opposite to the base plate 114 to close the slide groove 1129. This prevents the guide protrusion 136 from disengaging from the sleeve 112 as it moves along the slide groove 1129. The liner 19 has a latch hole 191 through which the latch 13 passes, allowing the latch 13 to protrude out of the housing 11 through the latch hole 191 or retract into the housing 11 through the latch hole 191.

[0049] The liner 19 is also provided with mounting holes 193, through which fasteners such as screws can pass, so that the fasteners can fix the liner 19 to the door frame, thereby fixing the self-spring-loaded bolt lock 10 to the door frame.

[0050] In summary, the trigger tongue 13 of the self-spring-loaded bolt lock 10 of this application retracts into the outer shell 11 when it abuts against the door frame, so that at least a portion of the positioning member 15 is located in the clearance groove 1121, and the bolt 16 can extend out of the trigger tongue 13 to engage with the door frame, thereby fixing the door to the door frame. When the bolt 16 retracts, the trigger tongue 13 extends relative to the outer shell 11, and at least a portion of the positioning member 15 is located in the through hole 132, so that the bolt 16 is stopped by the positioning member 15 and cannot extend out of the outer shell 11, thus preventing the bolt 16 from abutting against the door frame when the door is closed. Compared with existing bolt locks, the self-spring-loaded bolt lock 10 of this application sets the positioning member 15 in the trigger tongue 13, so there is no need to set other structures between the bolt 16 and the trigger tongue 13 to install the trigger tongue 13, making the structure simpler and the cost of the self-spring-loaded bolt lock 10 lower.

[0051] In this utility model, unless otherwise explicitly specified or limited, the term "assembly" and other such terms should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components; it can be merely surface contact; or it can be a surface contact connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0052] Furthermore, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as referring to specific or particular structures. The description of "some embodiments" means that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this utility model, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate different embodiments or examples described in this utility model, as well as the features of different embodiments or examples.

[0053] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A self-springing bolt lock, characterized in that, include: The outer casing has an inner wall with a clearance groove. A trigger tongue is movably disposed on the housing along the axial direction of the housing and can extend relative to the housing or retract against the door frame. The trigger tongue is provided with a through hole and a receiving hole communicating with the through hole. A positioning element is movably disposed in the receiving hole. When the trigger tongue extends relative to the housing, at least a portion of the positioning element is located in the through hole, and when the trigger tongue retracts relative to the housing, at least a portion of the positioning element is located in the clearance groove. as well as A pin rod, which passes through the housing and the through hole, is capable of extending beyond the trigger tongue when at least a portion of the positioning member is located in the recess, or being stopped by the positioning member when at least a portion of the positioning member is located in the through hole.

2. The self-springing bolt lock according to claim 1, characterized in that, The receiving hole is a tapered hole, and the diameter of the receiving hole gradually decreases along the direction close to the central axis of the through hole.

3. The self-springing bolt lock according to claim 2, characterized in that, The receiving hole has a first opening and a second opening. The first opening is located on the inner wall of the trigger tongue, and the second opening is located on the outer wall of the trigger tongue. The positioning member is spherical, and the diameter of the positioning member is larger than the diameter of the first opening and smaller than the diameter of the second opening.

4. The self-springing bolt lock according to claim 1, characterized in that, There are multiple receiving holes, which are spaced apart circumferentially along the through hole. There are multiple positioning members, which are correspondingly positioned in the multiple receiving holes.

5. The self-springing bolt lock according to claim 1, characterized in that, The outer shell includes a first inner circumferential surface, a second inner circumferential surface, and a third inner circumferential surface. The first inner circumferential surface, the second inner circumferential surface, and the third inner circumferential surface are connected sequentially along the direction in which the trigger tongue retracts relative to the outer shell. The inner diameter of the third inner circumferential surface is larger than the inner diameter of the first inner circumferential surface. The second inner circumferential surface and the third inner circumferential surface form the clearance groove.

6. The self-springing bolt lock according to claim 5, characterized in that, The first inner circumferential surface and the third inner circumferential surface are coaxially arranged. The second inner circumferential surface is inclined relative to the first inner circumferential surface and the third inner circumferential surface, and the inner diameter of the second inner circumferential surface gradually increases along the direction in which the trigger tongue retracts relative to the outer shell.

7. The self-springing bolt lock according to claim 1, characterized in that, The outer casing includes a sleeve and a base plate connected together. The trigger tongue is movably disposed in the sleeve. The pin rod passes through the interior of the base plate and the sleeve. The self-springing pin lock also includes an elastic element disposed in the sleeve. One end of the elastic element abuts against the base plate, and the other end abuts against the trigger tongue.

8. The self-springing bolt lock according to claim 7, characterized in that, The trigger tongue has an annular groove at one end near the base plate. The annular groove is located on the outer wall of the trigger tongue. The elastic element is sleeved on the pin rod, and one end of the elastic element is located in the annular groove.

9. The self-springing bolt lock according to claim 7, characterized in that, The sleeve is provided with a sliding groove extending axially along the outer shell. The sliding groove is at least provided on the inner wall of the sleeve. The outer wall of the trigger tongue is provided with a guide protrusion. The guide protrusion is provided in the sliding groove and is movable along the sliding groove.

10. The self-springing bolt lock according to claim 9, characterized in that, The groove passes through one end of the sleeve opposite to the base plate. The self-springing bolt lock also includes a liner plate connected to one end of the sleeve opposite to the base plate to close the groove. The liner plate has a latch hole through which the trigger tongue passes.

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