Lock tongue and door lock
By stamping protrusions onto the lock tongue blank and then molding them with plastic, the problem of door locks freezing in cold weather was solved, resulting in cost reduction and improved structural precision.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TAICANG BOZE AUTOMOBILE TECHNOLOGY CO LTD
- Filing Date
- 2025-06-13
- Publication Date
- 2026-06-30
AI Technical Summary
Existing car door locks are prone to freezing in cold weather, requiring separate pin and riveting processes, which results in high costs and the need for larger pin diameters.
By stamping protrusions onto the latch blank and creating recesses on the opposing surfaces, and then molding with plastic coating, an integrated latch structure is formed, eliminating the need for separate pin and riveting processes.
This reduces manufacturing costs, and allows for smaller protrusion diameters while still meeting strength requirements, enabling more precise design.
Smart Images
Figure CN224432272U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vehicles, specifically to car door locks, such as electric vehicle door locks, which integrate an ice-breaking function. On one hand, this utility model relates to car door locks. On the other hand, this utility model relates to the latch of a car door lock. Background Technology
[0002] In cold weather, car door locks risk freezing. To address this, many vehicles have incorporated an ice-breaking function into their door locks. This function is typically achieved by a pin on the latch bolt, which connects to another linkage to facilitate ice breaking. The pin is usually riveted directly to the latch bolt.
[0003] Figure 1A A schematic perspective view of a prior art car door lock is shown. Figure 1B It shows Figure 1A The door lock 1 includes a lock housing (not shown) and a latch 10 installed within the lock housing. The latch 10 is rotatable between a locked position and an unlocked position. In the locked and unlocked positions, the latch 10, specifically the latch hook 11, can engage and disengage with the latch to lock and unlock the door lock, respectively. Furthermore, the door lock 1 also has a pin 20 riveted to the riveting hole 12 of the latch 10.
[0004] Current technical solutions require separate pins and separate riveting processes. Furthermore, since the pins are independent of the latch, they need to have a certain diameter to ensure strength requirements. Utility Model Content
[0005] The purpose of this invention is to overcome the aforementioned shortcomings of the current technical solutions.
[0006] According to a first aspect, the present invention provides a locking tongue. The locking tongue has opposing surfaces, one of which has a protrusion integrally formed with the surface.
[0007] According to an embodiment, the protrusion is formed by embossing, and a recess is formed on the opposing surface. Preferably, the latch is a stamped component, and the protrusion is formed simultaneously with stamping the latch.
[0008] According to an embodiment, the latch includes a latch blank and a plastic-coated portion molded onto the latch blank. A protrusion is located on the latch blank and extends out of the plastic-coated portion, and the plastic-coated portion forms a plastic-coated sealing edge around the protrusion.
[0009] According to an embodiment, the plastic-coated portion covers the depression.
[0010] According to the second aspect, the present invention provides a door lock including the above-mentioned locking tongue.
[0011] The latch of this invention is manufactured by the following method: providing a latch blank having opposing surfaces; stamping the latch blank to create a protrusion on one of its surfaces, while simultaneously forming a corresponding depression on the opposing surface of the latch; and molding the latch blank with plastic coating to obtain the latch.
[0012] According to an embodiment, the latch blank is formed by stamping. Preferably, the latch blank and the protrusion are formed simultaneously in the same stamping process.
[0013] Compared to current technical solutions, the locking tongue and corresponding manufacturing method of this utility model can eliminate the need for separate pin and riveting processes, reducing manufacturing costs. Moreover, since the protrusion is integrally formed with the locking tongue through embossing, the dimensions can be made more precise, and the diameter of the protrusion can be designed to be smaller while still meeting strength requirements. Attached Figure Description
[0014] The embodiments of the present invention will be explained in more detail in the accompanying drawings, in which:
[0015] Figure 1 is a schematic perspective view of a prior art car door lock;
[0016] Figure 1B yes Figure 1A A schematic perspective view of the latch;
[0017] Figures 2A-2D This is a schematic diagram of a method for manufacturing a locking tongue according to an embodiment of the present invention, wherein... Figure 2A This is a schematic perspective view of the latch from above after embossing; Figure 2B This is a schematic perspective view of the latch from below after embossing; Figure 2C This is a schematic perspective view of the latch from above after plastic molding; Figure 2D This is a schematic perspective view of the latch from below after plastic molding.
[0018] In the accompanying drawings, embodiments of the present invention are shown in a simplified manner for clarity. Furthermore, the drawings are not necessarily shown to scale.
[0019] List of reference numerals
[0020] 1. Car door lock
[0021] 10. Locking tongue
[0022] 11. Locking hook
[0023] 12 Riveting holes
[0024] 20 pins
[0025] 100 Locking Tongue
[0026] 110 Locking Tongue Blank
[0027] 111 Carabiner
[0028] 112 protrusions
[0029] 113 Depression
[0030] 120 Plastic Coating Department
[0031] 121 Plastic-coated sealing edge
[0032] 122 Plastic-coated part Detailed Implementation
[0033] The locking tongue 100 of the car door lock of this utility model is described in detail with reference to the accompanying drawings. For ease of description, directional terms are used in the specification, which refer to the orientation shown in the accompanying drawings; the actual orientation may be different.
[0034] Figures 2A-2D A latch 100 according to an embodiment of the present invention is shown. As shown, the latch 100 includes a latch blank 110 and a plastic-coated portion 120 molded onto the latch blank 110. The latch blank 110 is a stamped part with opposing upper and lower surfaces (see Figure 120). Figure 1A ) and hook 111, and on one of the surfaces (in this case is Figure 2A The upper surface of the latch blank 110 is provided with a protrusion 112. The protrusion 112 is formed by stamping while the latch blank 110 is being stamped, so it is integrally formed with the upper surface, and a corresponding recess 113 is formed on the opposite lower surface.
[0035] The plastic-coated portion 120 is formed by plastic-coating molding after stamping a latch blank 111 with a protrusion 112. The plastic-coated portion 120 does not cover the protrusion 112; instead, the protrusion 112 extends out of the plastic-coated portion 120, and the plastic-coated portion 120 forms a plastic-coated sealing edge 121 around the protrusion 112. The plastic-coated portion 120 covers the recess 113, forming a plastic-coated cover portion 122.
[0036] The locking tongue 100 of this utility model is manufactured by the following method: First, as Figure 2A and Figure 2B As shown, the latch blank 110 is formed by stamping. During stamping, a protrusion 112 is stamped onto one surface of the latch blank 110, and a corresponding recess 113 is formed on the opposite surface of the latch blank 110. Then, as... Figure 2C and Figure 2D As shown, the latch blank 110 is molded with plastic material to obtain the final latch 100.
[0037] The presently preferred embodiments of this utility model have been explained in detail above, intended to illustrate the principles of the utility model, and the wording and expressions used are illustrative rather than restrictive. Those skilled in the art will understand that various modifications and variations of the above embodiments are possible without departing from the scope of this utility model. Therefore, in some cases, features disclosed in this utility model may be used independently of other features. On the other hand, features disclosed in this utility model may be combined when necessary to provide various combinations.
Claims
1. A latch having opposing surfaces, wherein a protrusion is provided on one of the surfaces, characterized in that, The protrusion is integrally formed with the surface.
2. The locking tongue according to claim 1, characterized in that, The protrusions are formed by embossing, and corresponding depressions are formed on the opposite surfaces.
3. The locking tongue according to claim 1 or 2, characterized in that, The latch is a stamped component, and the protrusion is formed during the stamping of the latch.
4. The locking tongue according to claim 1 or 2, characterized in that, The latch includes a latch blank and a plastic-coated part molded on the latch blank. The protrusion is located on the latch blank and extends out of the plastic-coated part, and the plastic-coated part forms a plastic-coated sealing edge around the protrusion.
5. The locking tongue according to claim 4, characterized in that, The plastic coating covers the depression.
6. A car door lock, characterized in that, It includes a locking tongue according to any one of claims 1-5.