Nail-free connecting structure of dead bolt and dragging body and door lock

Abstract

The nail-free connecting structure of the dead bolt and the dragging body and the door lock are characterized in that the dead bolt is of a hollow cup-shaped structure, the dragging body is provided with an inserting plate which is of a flat-plate-shaped structure and is inserted into the dead bolt, a clamping groove for containing part of the inserting plate is formed in the side wall of the dead bolt, and the inserting plate is in interference fit with the clamping groove. According to the invention, the dead tongue is fixedly connected with the insertion plate through the interference fit of the clamping groove, the dragging body abuts against the side wall of the clamping groove when the dead tongue is subjected to a lateral load, and the dead tongue is supported by the side wall of the clamping groove, so that the lateral load bearing capacity is better. When the dead tongue bears an axial load, the dead tongue resists the axial load by means of friction force between the dragging body and the clamping groove.

Description

Technical Field

[0001] The present invention relates to the field of locks, and specifically to a nail-free connection structure between a dead tongue and a trailing body and a door lock. Background Art

[0002] The dead tongue is usually fixedly connected to the trailing body with a plate-like structure by a rivet, such as a semi-automatic anti-theft lock disclosed in a Chinese patent with the publication number CN206458171U.

[0003]

[0004] Table 1 Firmness requirement table for 5.2 of standard QB / T2473-2017

[0005] Please refer to Table 1. The standard QB / T2473-2017 for exterior door locks has requirements for the firmness of the dead tongue.

[0006] The lateral firmness of the dead tongue should be greater than the axial load.

[0007] In the prior art, when connecting the dead tongue and the trailing body with a rivet, there are many parts. In addition, the trailing body often needs to be bent to fit the surface of the dead tongue. Summary of the Invention

[0008] The purpose of the present invention is to provide a nail-free connection structure between a dead tongue and a trailing body and a door lock, which has fewer parts and is convenient to connect.

[0009] To achieve the above purpose, the present invention provides a nail-free connection structure between a dead tongue and a trailing body. The dead tongue and the trailing body, the dead tongue is a hollow cup-shaped structure, the trailing body has an insertion plate with a flat plate structure inserted into the dead tongue, a card slot for accommodating part of the insertion plate is provided on the side wall of the dead tongue, and the insertion plate and the card slot are in interference fit.

[0010] In an embodiment of the present invention, convex strips extending towards the center of the dead tongue are provided on the inner wall of the dead tongue on both sides of the insertion plate. The convex strips and the adjacent convex strips and the inner wall of the dead tongue enclose to form the card slot. The convex strips have a certain elasticity, and the cross-sectional size of the convex strips can be adjusted by adjusting the mold as needed.

[0011] In an embodiment of the present invention, the root of the convex strip close to the side wall of the dead tongue has a first release depression facing away from the center of the card slot. During the process of inserting the trailing body into the card slot, on the one hand, the trailing body can deform towards the first release depression, and on the other hand, the debris falling off the trailing body or the dead tongue during the insertion process can enter the first release depression to prevent jamming during the insertion process.

[0012] In an embodiment of the present invention, the trailing body is provided with a positioning step abutting against the end face of the side wall of the dead tongue, which can accurately control the relative position between the trailing body and the dead tongue.

[0013] In an embodiment of the present invention, a pair of plugs extending away from the center of the plug board are provided at the end of the plug board, and the end of the plug has an insertion guiding surface to facilitate the alignment of the trailing body with the card slot.

[0014] In an embodiment of the present invention, a second release recess that bends towards the center of the plug board is provided at the end of the plug board near the positioning step. Debris that falls off the trailing body or the stationary tongue during the insertion process can enter the second release recess, preventing debris from getting stuck between the positioning step and the end face of the side wall of the stationary tongue, which may cause inaccurate relative positions between the trailing body and the stationary tongue.

[0015] In an embodiment of the present invention, the side of the rib away from the card slot is an inclined surface extending from the center of the stationary tongue towards the center of the card slot, and the rib has a plane that fits with the plug board.

[0016] In an embodiment of the present invention, the stationary tongue is a square stationary tongue or a round stationary tongue.

[0017] In an embodiment of the present invention, the stationary tongue is formed by powder metallurgy, casting, or die-casting, and the trailing body is formed by laser cutting or stamping.

[0018] The present invention also provides a door lock, including the nail-free connection structure of the stationary tongue and the trailing body according to any one of the above.

[0019] In the present invention, the stationary tongue is fixedly connected to the plug board through interference fit of the card slot. When the stationary tongue is subjected to a lateral load, the trailing body abuts against the side wall of the card slot, and the stationary tongue obtains good support from the side wall of the card slot and has a good lateral load-bearing capacity. When the stationary tongue is subjected to an axial load, it relies on the friction between the trailing body and the card slot to resist the axial load. In the present invention, no rivets are required, and no rivet holes need to be drilled. The structures of the stationary tongue and the trailing body are relatively simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of the nail-free connection structure of the stationary tongue and the trailing body according to the first embodiment of the present invention.

[0021] Figure 2 For Figure 1 the structural diagram of the stationary tongue.

[0022] Figure 3 For Figure 2 the enlarged view at F of

[0023] Figure 4 For Figure 3 the structural diagram of the trailing body of

[0024] Figure 5 For Figure 4 the enlarged view at G of DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] Please refer to Figures 1-5 , the nail-free connection structure of the tongue and the body in the first embodiment of the present invention, the tongue 1 and the body 2, the tongue 1 is a hollow cup-shaped structure, the body 2 has an insertion plate 21 with a flat plate structure inserted into the tongue 1, and a card slot 10 for accommodating a part of the insertion plate 21 is provided on the side wall of the tongue 1, and the insertion plate 21 and the card slot 10 are in interference fit.

[0027] Convex strips 11 extending towards the center of the tongue 1 are provided on the inner wall of the tongue 1 on both sides of the insertion plate 21, and the convex strips 11, the adjacent convex strips 11 and the inner wall of the tongue 1 enclose to form the card slot 10. The convex strips 11 have a certain elasticity, and the cross-sectional size of the convex strips 11 can be adjusted by adjusting the mold as needed, and the frictional force between the insertion plate 21 and the card slot 10 can be adjusted.

[0028] At the root of the convex strip 11 close to the side wall of the tongue 1, there is a first release recess 110 facing away from the center of the card slot 10. During the process of inserting the body 2 into the card slot 10, on the one hand, the body 2 can be deformed towards the first release recess 110, and on the other hand, the debris falling off the body 2 or the tongue 1 during the insertion process can enter the first release recess 110 to prevent jamming during the insertion process.

[0029] The body 2 is provided with a positioning step 22 against the end face of the side wall of the tongue 1, which can accurately control the relative position between the body 2 and the tongue 1. A pair of plugs 211 extending away from the center of the insertion plate 21 are provided at the end of the insertion plate 21, and the end of the plug 211 has an insertion guiding surface 211a to facilitate the alignment of the body 2 with the card slot 10. By adjusting the length of the plug 211 through the mold, the frictional force between the insertion plate 21 and the card slot 10 can be adjusted.

[0030] At the end of the insertion plate 21 close to the positioning step 22, a second release recess 220 bent towards the center of the insertion plate 21 is provided. During the insertion process, the debris falling off the body 2 or the tongue 1 can enter the second release recess 220 to prevent the debris from being stuck between the positioning step 22 and the end face of the side wall of the tongue 1, resulting in inaccurate relative position between the body 2 and the tongue 1.

[0031] The side of the convex strip 11 away from the card slot 10 is an inclined surface extending from the center of the tongue 1 towards the center of the card slot 10, and the convex strip 11 has a plane that fits the insertion plate 21. The tongue 1 is a square tongue 1 or a circular tongue 1. The tongue 1 is made of powder metallurgy, and can also be cast or die-cast in other embodiments. The body 2 is formed by stamping, and can also be formed by laser cutting in other embodiments.

[0032] The manufacturing method of the nail - free connection structure between the stationary tongue and the trailing body in the present invention includes:

[0033] 1. The stationary tongue 1 is formed by powder metallurgy processing, and the pressing density is not less than 7 g / cm³;

[0034] 2. The trailing body 2 is formed by stamping and burrs are removed; the interference amount between the inserting plate 21 and the card slot 10 is 0.1 mm, that is, the width A of the inserting plate 21 is 0.2 mm greater than the inner wall width A' of the stationary tongue 1, and the thickness B of the inserting plate 21 is 0.1 mm greater than the width B' of the card slot 10.

[0035] 3. Fix the inserting plate 21 on the lower tooling of a 5t press, and fix the stationary tongue 1 on the upper tooling of the press;

[0036] 4. During the insertion process, control the upper tooling of the press to press down, sleeved the card slot 10 outside the inserting plate 21 until the end face of the stationary tongue 1 abuts against the positioning step 22;

[0037] 5. Clean up the debris generated during the insertion process.

[0038] The present invention also provides a door lock, including the nail - free connection structure between the stationary tongue 1 and the trailing body 2 described in any one of the above.

[0039] In the present invention, the stationary tongue 1 is fixedly connected by the interference fit between the card slot 10 and the inserting plate 21. When the stationary tongue 1 is subjected to a lateral load, the trailing body 2 abuts against the side wall of the card slot 10. The stationary tongue 1 obtains good lateral load - bearing capacity supported by the side wall of the card slot 10 and can meet the specification requirements. When the stationary tongue 1 is subjected to an axial load, it relies on the friction force between the trailing body 2 and the card slot 10 to resist the axial load and can meet the specification requirements. In the present invention, no rivets are required, and no rivet holes need to be drilled. The structures of both the stationary tongue and the trailing body are relatively simple.

[0040] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A nail-free connection structure of a dead tongue and a towing body, the dead tongue and the towing body, characterized in that: The dead tongue is a hollow cup-shaped structure, the drag body has a plug-in plate of a flat plate structure inserted into the dead tongue, the side wall of the dead tongue is provided with a slot for accommodating part of the plug-in plate, and the plug-in plate is interference-fitted with the slot.

2. The nail-free connection structure of the dead tongue and the tow body according to claim 1 is characterized in that: The inner wall of the dead tongue is provided with convex strips extending toward the center of the dead tongue and located on both sides of the plug board. The convex strips, adjacent convex strips and the inner wall of the dead tongue are combined to form the clamping groove.

3. The nail-free connection structure of the dead tongue and the tow body according to claim 2 is characterized in that: The root of the convex strip close to the side wall of the dead tongue has a first release recess facing away from the center of the slot.

4. The nail-free connection structure of the dead tongue and the tow body according to claim 3 is characterized in that: The drag body is provided with a positioning step which abuts against the end surface of the side wall of the dead tongue.

5. The nail-free connection structure of the dead tongue and the tow body according to claim 4 is characterized in that: A pair of plugs extending away from the center of the plug board are provided at the end of the plug board, and the end of the plug has an insertion guide surface.

6. The nail-free connection structure of the dead tongue and the tow body according to claim 5, characterized in that: The end of the inserting plate close to the positioning step is provided with a second releasing recess bent toward the center of the inserting plate.

7. The nail-free connection structure of the dead tongue and the tow body according to claim 6, characterized in that: A side of the convex strip away from the slot is an inclined surface extending toward the center of the dead tongue toward the center of the slot, and the convex strip has a plane that fits with the plug board.

8. The nail-free connection structure of the dead tongue and the tow body according to claim 7, characterized in that: The dead tongue is a square dead tongue or a round dead tongue.

9. The nail-free connection structure of the dead tongue and the tow body according to claim 8, characterized in that: The dead tongue is formed by powder metallurgy, casting or die-casting, and the drag body is formed by laser cutting or stamping.

10. A door lock, characterized in that: The invention comprises a nail-free connection structure between a dead tongue and a towing body as described in any one of claims 1 to 9.

Images