Spring door closer bolt

Abstract

The utility model provides a spring door catch bolt, it relates to hardware fitting technical field, the utility model discloses a first mounting seat, second mounting seat, bolt rod and spring, when unlocking state, the bolt rod passes through first mounting seat, and rotation is connected on first mounting seat, when locking state, the bolt rod passes through first mounting seat with second mounting seat, the spring is installed between first mounting seat with bolt rod, when unlocking state, the bolt rod is axially limited on first mounting seat through spring, when locking state, the bolt rod is axially limited on first mounting seat with second mounting seat through spring. The spring door catch bolt of the utility model can guarantee the locking state of door after the bolt rod closes door, effectively prevents the security risk caused by the accidental opening of door.

Description

Technical Field

[0001] This utility model relates to the field of hardware accessories technology, and in particular to a spring-loaded door latch. Background Technology

[0002] A latch is a device that uses mechanical locking to achieve the anti-theft function of doors and windows. It consists of two parts: a movable rod and a latch hole. Existing latches require manual pushing to start and close. If the latch is not reset, the door may become loose and open, failing to provide anti-theft functionality and creating a safety hazard.

[0003] Therefore, there is an urgent need for a spring-loaded door latch that can ensure the door remains locked after it is closed, effectively preventing safety hazards caused by accidental opening of the door. Utility Model Content

[0004] The purpose of this utility model is to provide a spring-loaded door latch that solves the technical problem in the prior art where the latch fails to return to its original position, easily causing the door to loosen and open. The various technical effects of the preferred technical solution among the many technical solutions provided by this utility model are detailed below.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This utility model provides a spring-loaded door latch, comprising: First mounting base and second mounting base; When the latch is in the unlocked state, the latch passes through the first mounting base and is rotatably connected to the first mounting base; when the latch is in the locked state, the latch passes through the first mounting base and the second mounting base. A spring is installed between the first mounting base and the pin. In the unlocked state, the pin is axially restrained on the first mounting base by the spring. In the locked state, the pin is axially restrained on the first mounting base and the second mounting base by the spring.

[0006] Preferably, the pin includes: A first pin, a second pin, and a third pin are connected sequentially. The first pin and the third pin are arranged parallel to each other. The second pin is vertically connected between the first pin and the third pin. The third pin passes through the first mounting base. In the locked state, the first pin passes through the second mounting base.

[0007] Preferred options also include: The first pin hole is formed on the first mounting base, and the third pin passes through the first pin hole; The second pin hole is located on the second mounting base. When locked, the first pin passes through the second pin hole.

[0008] Preferred options also include: The mounting groove is formed inside the side wall of the first mounting base, and the first pin hole passes through the mounting groove; A spring is sleeved on the third pin located within the mounting groove and abuts against the side wall of the third pin and the inner side wall of the mounting groove.

[0009] Preferred options also include: An annular groove is formed on the peripheral sidewall of the third pin. A retaining ring is inserted into the annular groove and located within the mounting groove. A spring abuts against the side of the retaining ring near the second pin and the inner wall of the mounting groove. The outer diameter of the retaining ring is larger than the inner diameter of the first pin hole.

[0010] Preferred options also include: A cover plate that covers the opening of the mounting groove.

[0011] Preferably, the length of the third pin is greater than the length of the first pin.

[0012] In the technical solution provided by this utility model, the latch rod can be rotatably connected to the first mounting seat, and can also be manually inserted into both the first and second mounting seats simultaneously to lock the door. When the latch rod is only connected to the first mounting seat, the door is in the unlocked state. The main function of the spring is to provide axial return force for the latch rod. Whether locking or unlocking the door, the latch rod needs to be manually pushed to insert or disengage from the second mounting seat. The return force of the spring can stably maintain the latch rod in a state where it is simultaneously inserted into or disengaged from both the first and second mounting seats. When unlocking the door, manually pull the latch from the second mounting bracket while overcoming the spring's rebound force and rotating the latch to completely disengage it. Upon releasing the latch, it moves axially according to the spring's rebound force, thus unlocking the door. When locking the door, manually push the latch axially while overcoming the spring's rebound force and rotating it to bring it closer to and align it with the second mounting bracket. Upon releasing the latch, it moves axially according to the spring's rebound force and automatically inserts into the second mounting bracket, avoiding the risk of incomplete manual insertion and locking the door. This spring-loaded door latch ensures the door remains locked after closing, effectively preventing safety hazards caused by accidental door opening. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a first-view schematic diagram of the spring-loaded door latch of this utility model; Figure 2 This is a second-view schematic diagram of the spring-loaded door latch of this utility model; Figure 3 This is a cross-sectional schematic diagram of the first mounting base and the pin rod of this utility model; Figure 4 yes Figure 3 A magnified view of part A in the diagram.

[0015] In the figure: 1. First mounting base; 2. Second mounting base; 3. First pin hole; 4. Second pin hole; 5. Insert pin; 6. First pin; 7. Second pin; 8. Third pin; 9. Cover plate; 10. Mounting groove; 11. Spring; 12. Snap ring; 13. Ring groove. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0017] refer to Figure 1-4 A specific embodiment of this utility model provides a spring-loaded door latch, including a first mounting base 1, a second mounting base 2, a latch rod 5, and a spring 11. In the unlocked state, the latch rod 5 passes through the first mounting base 1 and is rotatably connected to the first mounting base 1. In the locked state, the latch rod 5 passes through the first mounting base 1 and the second mounting base 2. The spring 11 is installed between the first mounting base 1 and the latch rod 5. In the unlocked state, the latch rod 5 is axially restricted to the first mounting base 1 by the spring 11. In the locked state, the latch rod 5 is axially restricted to the first mounting base 1 and the second mounting base 2 by the spring 11.

[0018] A latch is a device that uses mechanical locking to achieve the anti-theft function of doors and windows. It consists of two parts: a movable rod and a latch hole. Existing latches require manual pushing to open and close. If the latch is not reset, the door may become loose and unable to function as an anti-theft device, creating a security hazard. In this application, the latch rod 5 can be rotatably connected to the first mounting base 1, and can also be manually inserted into both the first mounting base 1 and the second mounting base 2 simultaneously to lock the door. When the latch rod 5 is only connected to the first mounting base 1, the door is unlocked. The main function of the spring 11 is to provide axial return force to the latch rod 5. Whether locking or unlocking the door, the latch rod 5 needs to be manually pushed to insert or disengage from the second mounting base 2. The return force of the spring 11 allows the latch rod 5 to stably maintain a state where it is simultaneously inserted into the first mounting base 1 and the second mounting base 2 or disengaged from the second mounting base 2 (i.e., only inserted into the first mounting base 1). (Unlocked state); When the door needs to be unlocked, manually pull the latch 5 out of the second mounting base 2, while overcoming the rebound force generated by the spring 11, and rotate the latch 5 so that the latch 5 is completely disengaged from the second mounting base 2. After releasing, the latch 5 moves axially according to the rebound force of the spring 11, thereby achieving the unlocked state of the door; When the door needs to be locked, manually push the latch 5 axially, while overcoming the rebound force generated by the spring 11, and rotate the latch 5, thereby bringing the latch 5 close to and aligning it with the second mounting base 2. After releasing, the latch 5 moves axially according to the rebound force of the spring 11 and automatically inserts into the second mounting base 2, avoiding the hidden danger of manual insertion not being in place, thereby achieving the locked state of the door. The spring-loaded door latch of this application can ensure that the latch 5 is locked after the door is closed, effectively preventing the safety hazards caused by the door being accidentally opened.

[0019] This application applies to both doors and windows, as well as various cabinet doors.

[0020] Further optimize the plan, such as Figure 1-3 As shown, the pin 5 includes a first pin 6, a second pin 7, and a third pin 8. The first pin 6, the second pin 7, and the third pin 8 are connected in sequence. The first pin 6 and the third pin 8 are arranged in parallel. The second pin 7 is vertically connected between the first pin 6 and the third pin 8. The third pin 8 passes through the first mounting base 1. In the locked state, the first pin 6 passes through the second mounting base 2.

[0021] The main function of the first pin 6 is to achieve a locked state when inserted into the second mounting base 2; the main function of the second pin 7 is to connect the first pin 6 and the third pin 8; the third pin 8 is always inserted into the first mounting base 1, whether the door is locked or unlocked.

[0022] Further optimization of the scheme also includes a first pin hole 3 and a second pin hole 4. The first pin hole 3 is opened on the first mounting base 1, and the third pin 8 passes through the first pin hole 3. The second pin hole 4 is opened on the second mounting base 2. In the locked state, the first pin 6 passes through the second pin hole 4.

[0023] like Figure 1 As shown, the size of the first pin hole 3 is adapted to the size of the third pin 8, and the size of the second pin hole 4 is adapted to the size of the first pin 6. The first pin 6 passes through the second pin hole 4 to achieve a locking state, which is suitable for the case where the axes of the first pin hole 3 and the second pin hole 4 are parallel, that is, the installation state where the first mounting base 1 and the second mounting base 2 are installed side by side. If the third pin 8 passes through the first pin hole 3 and then continues to pass through the second pin hole 4 to achieve a locking state, it is suitable for the case where the axes of the first pin hole 3 and the second pin hole 4 are collinear, that is, the installation state where the first mounting base 1 and the second mounting base 2 are collinear. This application only shows one installation state, namely... Figure 1-2 The installation state of the first mounting base 1 and the second mounting base 2 side by side is shown.

[0024] Further optimization of the scheme also includes a mounting groove 10 and a spring 11. The mounting groove 10 is opened in the side wall of the first mounting seat 1. The first pin hole 3 passes through the mounting groove 10. The spring 11 is sleeved on the third pin 8 located in the mounting groove 10 and abuts against the side wall of the third pin 8 and the inner side wall of the mounting groove 10.

[0025] like Figure 3-4 As shown, the main function of the mounting slot 10 is to provide mounting space for the spring 11.

[0026] Further optimize the plan, such as Figure 4 As shown, it also includes an annular groove 13 and a retaining spring 12. The annular groove 13 is formed on the peripheral side wall of the third pin 8. The retaining spring 12 is inserted into the annular groove 13 and located in the mounting groove 10. The spring 11 abuts against the side of the retaining spring 12 near the second pin 7 and between it and the inner side wall of the mounting groove 10. The outer diameter of the retaining spring 12 is larger than the inner diameter of the first pin hole 3.

[0027] Before installing the retaining ring 12, insert the third pin 8 into the mounting groove 10 from the first end of the first pin hole 3. Then, put the spring 11 on the end of the third pin 8 away from the second pin 7. Then, continue to pass the third pin 8 through the second end of the first pin hole 3 until the annular groove 13 is close to the second end of the first pin hole 3. Insert the retaining ring 12 into the annular groove 13. Since the outer diameter of the retaining ring 12 is larger than the inner diameter of the first pin hole 3, the retaining ring 12 cannot pass through the first pin hole 3. In this way, the spring 11 can be abutted between the side of the retaining ring 12 near the second pin 7 and the inner wall of the mounting groove 10.

[0028] Further optimization of the scheme also includes a cover plate 9, which covers the groove 14 of the mounting groove 10.

[0029] like Figure 2-3 As shown, after the mounting groove 10 is opened in the side wall of the first mounting base 1, a slot 14 is formed on the side wall of the first mounting base 1. The cover plate 9 is placed in the slot 14 to protect the spring 11 and the snap ring 12 in the mounting groove 10 and prevent them from being removed at will.

[0030] The design was further optimized so that the length of the third pin 8 is greater than the length of the first pin 6.

[0031] like Figure 1-3 As shown, this arrangement can shorten the sliding stroke between the third pin 8 and the first pin 6, reducing the material used for the first pin 6. It allows the first pin 6 to be quickly inserted into or disengaged from the second pin hole 4, while ensuring an effective connection between the third pin 8 and the first mounting base 1.

[0032] It should be noted that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., used herein to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the equipment or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In this description, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A spring-loaded door latch, characterized in that, include: First mounting base (1) and second mounting base (2); When the pin (5) is in the unlocked state, the pin (5) passes through the first mounting base (1) and is rotatably connected to the first mounting base (1). When the pin is in the locked state, the pin (5) passes through the first mounting base (1) and the second mounting base (2). A spring (11) is installed between the first mounting base (1) and the pin (5). In the unlocked state, the pin (5) is axially restricted on the first mounting base (1) by the spring (11). In the locked state, the pin (5) is axially restricted on the first mounting base (1) and the second mounting base (2) by the spring (11).

2. The spring-loaded door latch according to claim 1, characterized in that, The pin (5) includes: The first pin (6), the second pin (7), and the third pin (8) are connected in sequence. The first pin (6) and the third pin (8) are arranged in parallel. The second pin (7) is vertically connected between the first pin (6) and the third pin (8). The third pin (8) passes through the first mounting base (1). In the locked state, the first pin (6) passes through the second mounting base (2).

3. The spring-loaded door latch according to claim 2, characterized in that, Also includes: The first pin hole (3) is opened on the first mounting base (1), and the third pin (8) passes through the first pin hole (3). The second pin hole (4) is located on the second mounting base (2). When locked, the first pin (6) passes through the second pin hole (4).

4. The spring-loaded door latch according to claim 3, characterized in that, Also includes: Mounting groove (10), the mounting groove (10) is opened in the side wall of the first mounting base (1), and the first pin hole (3) passes through the mounting groove (10). A spring (11) is sleeved on the third pin (8) located in the mounting groove (10) and abuts against the side wall of the third pin (8) and the inner side wall of the mounting groove (10).

5. The spring-loaded door latch according to claim 4, characterized in that, Also includes: An annular groove (13) is formed on the peripheral sidewall of the third pin (8); A retaining ring (12) is inserted into the annular groove (13) and located in the mounting groove (10). A spring (11) abuts against the side of the retaining ring (12) near the second pin (7) and the inner wall of the mounting groove (10). The outer diameter of the retaining ring (12) is larger than the inner diameter of the first pin hole (3).

6. The spring-loaded door latch according to claim 4, characterized in that, Also includes: Cover plate (9) covers the slot (14) of the mounting groove (10).

7. The spring-loaded door latch according to claim 2, characterized in that, The length of the third pin (8) is greater than the length of the first pin (6).

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