Automobile mortise lock structure, switch and key structure thereof

Abstract

The utility model discloses an automobile mortise lock structure, a switch and a key structure thereof, relates to the field of switch equipment, and can solve the problem of poor contact caused by pollution of an inner cavity of the switch in the prior art. The switch comprises a shell connected to the installation support, a first terminal connected to an inner cavity of the shell, a second terminal connected to the inner cavity of the shell, a third terminal connected to the inner cavity of the shell, an elastic piece connected to one end of the first terminal and connected with the third terminal in an abutting mode, and a key connected to the elastic piece. A key hole communicated with an inner cavity of the shell is formed in the top face of the shell, the key penetrates out of the key hole, the key structure comprises an elastic piece connected to the top face of the shell and a key column connected to the elastic piece, a sealing cavity is defined by the elastic piece and the top face of the shell, and the penetrating-out end, penetrating out of the key hole, of the key is located in the sealing cavity. A pressing surface matched with the key is formed on the inner wall of the sealing cavity of the elastic piece, and a pressing gap is formed between the pressing surface and the key, so that the key column extrudes the elastic piece, and the pressing surface abuts against the key.

Description

Technical Field

[0001] This application relates to the field of switchgear, and particularly to an automotive plug lock structure, a switch, and its button structure. Background Art

[0002] Normally open switches and normally closed switches are two common types of switches with similar structures but different working principles. A normally open switch is in an open state (i.e., the circuit is not connected) when not subjected to external force; when an external force is applied (such as pressing the switch button), structures such as the elastic sheet inside the switch deform, the circuit closes, and current passes through. A normally closed switch is in a closed state (the circuit is connected) when not subjected to external force; when an external force is applied, the internal structure of the switch deforms and the circuit is disconnected. Whether it is a normally open switch or a normally closed switch, their basic structures include a housing connected to an installation bracket, a plurality of terminals arranged in the inner cavity of the housing, an elastic sheet connecting the terminals and the button, and a button for operating the switch. These switches are widely used in industrial control, safety protection, detection, and control circuits, etc., such as for emergency stop buttons, access control systems, and mechanical limit switches.

[0003] Taking the normally closed switch as an example, in the prior art, as Figures 1-3 shown, the switch 1 is installed on the installation bracket 2. The switch 1 includes a housing 11 connected to the installation bracket 2, a first terminal 12 (input terminal) connected to the inner cavity of the housing 11, a second terminal 13 connected to the inner cavity of the housing 11, a third terminal 14 connected to the inner cavity of the housing 11, an elastic sheet 15 connected to one end of the first terminal 12 and in contact connection with the third terminal 14, a button 16 connected to the elastic sheet 15, a pressure rod 17 rotatably connected to the outer wall of the housing 11, and a spring 3 connected between the housing 11 and the installation bracket 2. The housing 11 is provided with a button hole communicating with its inner cavity, the button 16 passes through the button hole, and the protruding end of the button 16 abuts against the pressure rod 17. One end of the spring 3 abuts against the side of the pressure rod 17 away from the button 16. When the spring 3 is pressed, the spring 3 is compressed, the pressure rod 17 rotates and presses down the button 16, and the button 16 further presses down the elastic sheet 15, causing the elastic sheet 15 to separate from the third terminal 14 and connect to the second terminal 13. The second terminal 13 is in an open circuit and does not conduct current, thus disconnecting the circuit; after releasing the spring 3, the spring 3 returns to its original state, and the pressure rod 17 and the button 16 return to their initial positions under the reaction force of the elastic sheet 15, and the elastic sheet 15 contacts the third terminal 14 again, and the circuit is connected again.

[0004] However, there is a gap between the button hole and the button 16, and this gap communicates with the outside. Water, dust, and other foreign objects are likely to enter the switch interior through these gaps, contaminating the internal contacts, especially the contact surfaces of the elastic sheet 15 and the third terminal 14. This contamination will cause poor contact of the contacts, affect the normal conduction of current, and ultimately lead to signal abnormalities and equipment failures. These problems are particularly serious in open or harsh environments. Summary of the Invention

[0005] To this end, the present application provides an automotive plug lock structure, a switch and its button structure to solve the problem of poor contact caused by the contamination of the inner cavity of the switch in the prior art.

[0006] To achieve the above object, the present application provides the following technical solutions:

[0007] A button structure of a switch, the switch includes a housing connected to a mounting bracket, a first terminal connected to the inner cavity of the housing, a second terminal connected to the inner cavity of the housing, a third terminal connected to the inner cavity of the housing, a shrapnel connected to one end of the first terminal and in contact connection with the third terminal, and a button connected to the shrapnel. A button hole communicating with its own inner cavity is provided on the top surface of the housing, and the button passes through the button hole. The button structure includes an elastic member connected to the top surface of the housing and a key post connected to the elastic member. The elastic member and the top surface of the housing enclose a sealed cavity. The protruding end of the button passing through the button hole is located in the sealed cavity. The elastic member forms a pressing surface for cooperating with the button at the inner wall of the sealed cavity. There is a pressing gap between the pressing surface and the button, so that the key post presses the elastic member, and the pressing surface abuts against the button.

[0008] Optionally, a connecting sleeve for sleeving on the outer wall of the housing is connected to one end of the elastic member away from the key post, and the connecting sleeve is in interference fit with the outer wall of the housing.

[0009] Optionally, the key post is a hollow column with an open end. One end of the elastic member is connected to the connecting sleeve, and the other end is connected to the open end of the hollow column along the circumferential direction of the key post. The inner side surface of the elastic member near the open end of the hollow column forms the pressing surface. The connecting sleeve is sleeved on the outer side wall of the housing. The central axis of the key post coincides with the central axis of the elastic member, and the extension line of the central axis of the key post coincides with the button.

[0010] Optionally, the key post is a rigid member, and both the connecting sleeve and the elastic member are made of elastic materials.

[0011] Optionally, the key post, the elastic member and the connecting sleeve are integrally formed and are all made of elastic materials, and the wall thickness of the elastic member is smaller than the wall thickness of the key post.

[0012] Optionally, the elastic material is silica gel.

[0013] The present application also discloses a switch, which includes the key structure of the switch as described above. The mounting bracket is connected to the limit sleeve. The key column is located in the sleeve cavity of the limit sleeve. A relief hole is formed in the top surface of the limit sleeve, and an avoidance groove communicating with the sleeve cavity of the limit sleeve is formed in the side surface of the limit sleeve.

[0014] The present application also discloses an automotive plug lock structure, which includes a lock tongue connected to a seat belt, a trough-shaped seat installed on an automotive seat, a pop-up member slidably connected to the trough hole of the trough-shaped seat and used to cooperate with the ejection of the lock tongue, a switch connected to the trough-shaped seat, and a mounting bracket connected to the trough-shaped seat. The switch is the switch as described above. The pop-up member is integrally formed with a dial plate. The lock tongue is used to penetrate into the trough hole and abut against the pop-up member, driving the pop-up member to move towards the switch, so that the dial plate passes through the relief hole and the avoidance groove of the switch to press the key column.

[0015] Compared with the prior art, the present application has at least the following beneficial effects:

[0016] When it is necessary to press the key, press the key column, and the key column squeezes the elastic member, causing the elastic member to deform. In this way, the pressing surface approaches and abuts against the key. Under the action of an external force, the key is further pressed down, pushing the elastic sheet to bend downward, so that the elastic sheet is separated from the third terminal and contacts the second terminal. Since the second terminal is not connected to the current, the disconnection of the circuit is realized. When the key column is released from being pressed, the elastic member returns to its original state, the pressing surface is separated from the key, and the key returns to the initial position under the elastic force of the elastic sheet, and the elastic sheet contacts the third terminal again, and the circuit is connected again; during use, a sealed cavity is formed between the elastic member and the top surface of the housing, preventing external water, dust, and other foreign objects from entering the switch through the gap between the key and the key hole, thereby protecting the internal contacts, and ensuring the stability of the circuit and the normal operation of the device by reducing pollution and corrosion. Description of the Drawings

[0017] To more intuitively illustrate the prior art and the present application, several exemplary drawings are given below. It should be understood that the specific shapes and structures shown in the drawings generally should not be regarded as limiting conditions when implementing the present application; for example, those skilled in the art are capable of making routine adjustments or further optimizations to the addition / deletion / attribution division of certain units (components), specific shapes, positional relationships, connection methods, dimensional proportional relationships, etc. based on the technical concept disclosed in the present application and the exemplary drawings.

[0018] Figure 1 Schematic diagram of the matching structure of the switch and the mounting bracket related to the background technology of the present application;

[0019] Figure 2 Schematic diagram of the matching structure of the switch and the spring related to the background technology of the present application;

[0020] Figure 3 Schematic diagram of the internal structure of the switch related to the background art of the present application;

[0021] Figure 4 Schematic diagram of the mating structure of a switch, a key structure and a mounting bracket provided by an embodiment of the present application;

[0022] Figure 5 For Figure 4 Another perspective view;

[0023] Figure 6 Schematic diagram of the structure of the mounting bracket provided by an embodiment of the present application;

[0024] Figure 7 Schematic diagram of the mating structure of a switch and a key structure provided by an embodiment of the present application;

[0025] Figure 8 Bottom view of the key structure provided by an embodiment of the present application;

[0026] Figure 9 For Figure 7 Partial cross-sectional view in the a-a direction;

[0027] Figure 10 For Figure 9 Front view;

[0028] Figure 11 For Figure 7 Partial cross-sectional view in the b-b direction;

[0029] Figure 12 Partial structure schematic diagram of an automotive plug lock structure;

[0030] Figure 13 For Figure 12 Partial structure schematic diagram;

[0031] Figure 14 Schematic diagram of the structure of the ejector of the automotive plug lock structure.

[0032] Explanation of reference numerals:

[0033] 1. Switch; 11. Housing; 12. First terminal; 13. Second terminal; 14. Third terminal; 15. Spring piece; 16. Key; 17. Pressing rod; 2. Mounting bracket; 21. Limiting sleeve; 211. Relief hole; 212. Avoidance groove; 3. Spring; 4. Key structure; 41. Key post; 42. Elastic member; 43. Connecting sleeve; 5. Sealing cavity; 51. Pressing surface; 6. Grooved seat; 7. Lock tongue; 8. Ejector; 81. Dial plate. Detailed implementation manners

[0034] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0035] In the description of the present application: Unless otherwise specified, "a plurality of" means two or more. Terms such as "first", "second", "third", etc. in the present application are intended to distinguish the objects being referred to and do not have special significance in terms of technical connotations (for example, it should not be understood as emphasizing importance or order, etc.). Expressions such as "including", "comprising", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

[0036] Referring to Figures 3-11 , the present application discloses a key structure 4 of a switch. Taking a normally closed switch as an example, the switch 1 includes a housing 11 connected to a mounting bracket 2, a first terminal 12 connected to the inner cavity of the housing 11, a second terminal 13 connected to the inner cavity of the housing 11, a third terminal 14 connected to the inner cavity of the housing 11, a shrapnel 15 connected to one end of the first terminal 12 and in contact connection with the third terminal 14, and a key 16 connected to the shrapnel 15. A key hole communicating with its own inner cavity is provided on the top surface of the housing 11 (not shown in the figure), and the key 16 passes through the key hole. The key structure 4 includes an elastic member 42 connected to the top surface of the housing 11 and a key post 41 connected to the elastic member 42. The elastic member 42 and the top surface of the housing 11 enclose a sealed cavity 5. The passing end of the key 16 passing through the key hole is located in the sealed cavity 5. The elastic member 42 forms a pressing surface 51 for cooperating with the key 16 at the inner wall of the sealed cavity 5. There is a pressing gap between the pressing surface 51 and the key 16, so that the key post 41 presses the elastic member 42, and the pressing surface 51 abuts against the key 16.

[0037] When it is necessary to press the key 16, press the key post 41, and the key post 41 presses the elastic member 42, causing the elastic member 42 to deform. In this way, the pressing surface 51 approaches and abuts against the key 16, and the key 16 is further pressed down under the action of an external force, pushing the shrapnel 15 to bend downward, so that the shrapnel 15 separates from the third terminal 14 and contacts the second terminal 13. Since the second terminal 13 is not connected to the current, the circuit is thus disconnected. When the pressing of the key post 41 is released, the elastic member 42 returns to its original state, the pressing surface 51 separates from the key 16, and the key 16 returns to its initial position under the elastic force of the shrapnel 15, and the shrapnel 15 contacts the third terminal 14 again, and the circuit is connected again; during use, the elastic member 42 and the top surface of the housing 11 enclose a sealed cavity 5, preventing external water, dust and other foreign objects from entering the switch interior through the gap between the key 16 and the key hole, thereby protecting the internal contacts and ensuring the stability of the circuit and the normal operation of the device by reducing contamination and corrosion.

[0038] It should be added that the first terminal 12 is the input end of the circuit and is connected to a power source or a control signal source; the second terminal 13 is in an open state and does not conduct current; the third terminal 14 is the output end of the circuit and is connected to a load or a controlled device. When the elastic piece 15 is in the initial position, the first terminal 12 is in contact with the third terminal 14, and the circuit is connected; when the key 16 is pressed, the elastic piece 15 is separated from the third terminal 14, and the circuit is disconnected, thereby realizing the control and switching of the current.

[0039] The above embodiments take the normally closed switch as an example, and the normally open switch has the same working principle; moreover, the application scope of the key structure 4 of the present application is not limited to the normally closed or normally open switch, and other switches with a similar key 16 structure can be applied to the key structure 4.

[0040] One end of the elastic member 42 away from the key post 41 is connected with a connecting sleeve 43 for sleeving on the outer wall of the housing 11, and the connecting sleeve 43 is in interference fit with the outer wall of the housing 11.

[0041] One end of the elastic member 42 away from the key post 41 is in interference fit with the outer wall of the housing 11 through the connecting sleeve 43. Such a design ensures that the key structure 4 can be stably connected to the housing 11, avoiding loosening or falling off caused by vibration or external force during use. At the same time, the design of the connecting sleeve 43 enables the key structure 4 to achieve detachable connection, and users can conveniently replace and maintain it. When the key structure 4 needs to be replaced, only the connecting sleeve 43 needs to be removed from the outer wall of the housing 11, and then the new key structure 4 can be sleeved in, without disassembling the entire switch assembly, improving the convenience of maintenance and replacement.

[0042] In some embodiments, the key post 41 is a hollow column with one end open. One end of the elastic member 42 is connected to the connecting sleeve 43, and the other end is connected to the open end of the hollow column along the circumferential direction of the key post 41. The inner side surface of the elastic member 42 near the open end of the hollow column forms a pressing surface 51. The connecting sleeve 43 is sleeved on the outer side wall of the housing 11. This is beneficial for the key post 41, the elastic member 42, and the connecting sleeve 43 to be formed in one processing by a mold. The central axis of the key post 41 coincides with the central axis of the elastic member 42, and the extension line of the central axis of the key post 41 coincides with the key 16.

[0043] Since the central axis of the key post 41 coincides with the central axis of the elastic member 42, and the extension line of the central axis of the key post 41 coincides with the button 16, thus, the pressing force can be effectively transmitted to the button 16, ensuring that the pressing force is transmitted along a straight line direction, reducing the loss and deviation of the force, and enhancing the accuracy and sensitivity of the pressing. When pressing the key post 41, the force of the key post 41 is directly transmitted to the pressing surface 51 of the elastic member 42, causing the elastic member 42 to deform, and then pressing the button 16. The button 16 pushes the terminal through the elastic piece 15 to realize the opening or closing of the circuit. The elastic member 42 can quickly return to its original state after the external force is removed, causing the button 16 and the elastic piece 15 to also return to their initial positions, and the circuit is reconnected.

[0044] In some embodiments, the elastic member 42 is in a bowl-shaped structure. The key post 41 is connected to the center of the bottom of the bowl-shaped structure, the pressing surface 51 is located at the bottom of the bowl-shaped structure, and the connecting sleeve 43 is connected to the mouth of the bowl-shaped structure.

[0045] In some embodiments, the key post 41 is a rigid member, and both the connecting sleeve 43 and the elastic member 42 are made of elastic materials. Since the key post 41 is a rigid member, the rigid member structure is not easily deformed during the pressing process, and can effectively transmit the pressing force directly to the elastic member 42, thereby ensuring the accuracy and stability of the pressing operation.

[0046] In some embodiments, the rigid member can be a solid structure, and the rigid member is made of a metal material, such as stainless steel or aluminum alloy, etc.

[0047] In some embodiments, the key post 41, the elastic member 42, and the connecting sleeve 43 are integrally formed and are all made of elastic materials. The wall thickness of the elastic member 42 is smaller than the wall thickness of the key post 41. The design of integrally forming the key post 41, the elastic member 42, and the connecting sleeve 43 is convenient for one-time processing and forming, simplifies the production process, and improves the production efficiency and product consistency. In order to prevent the key post 41 and the elastic member 42 from deforming together during the pressing process, resulting in the ineffective transmission of the pressing force to the button 16, the wall thickness of the elastic member 42 is designed to be smaller than the wall thickness of the key post 41. In this way, during pressing, the key post 41 maintains high rigidity and is not easily deformed, while the elastic member 42, due to its smaller wall thickness, deforms first, and the pressing surface 51 approaches and abuts against the button 16 to achieve an effective pressing operation.

[0048] In some embodiments, the elastic material is silicone. Silicone, as an elastic material, has excellent elasticity and durability and can quickly return to its original state during the pressing process; in addition to silicone, other elastic materials can also be selected, such as polyurethane, thermoplastic elastomer, and nitrile rubber.

[0049] Reference Figures 4-6, this application also discloses a switch 1, which includes the button 16 structure of the switch 1 as described above. The mounting bracket 2 is connected to the limit sleeve 21. The key column 41 is located in the sleeve cavity of the limit sleeve 21. A relief hole 211 is provided on the top surface of the limit sleeve 21, and an avoidance groove 212 communicating with the sleeve cavity of the limit sleeve 21 is provided on the side surface of the limit sleeve 21.

[0050] Reference Figures 12-14 , this application also discloses an automotive plug lock structure, which includes a lock tongue 7 connected to the seat belt, a groove-shaped seat 6 installed on the vehicle seat, a pop-up member 8 slidably connected to the slot hole of the groove-shaped seat 6 and used to cooperate with the ejection of the lock tongue 7, a switch 1 connected to the groove-shaped seat 6, and a mounting bracket 2 connected to the groove-shaped seat 6. The switch 1 is the switch 1 as described above. The pop-up member 8 is integrally formed with a dial plate 81. The lock tongue 7 is used to penetrate the slot hole and abut against the pop-up member 8, driving the pop-up member 8 to move towards the switch 1, so that the dial plate 81 passes through the relief hole 211 and the avoidance groove 212 of the switch 1 to press the key column 41.

[0051] When a passenger or driver pulls the seat belt, the lock tongue 7 penetrates the slot hole and abuts against the pop-up member 8, driving the pop-up member 8 to move towards the switch 1. The dial plate 81 of the pop-up member 8 gradually approaches the switch 1 and passes through the relief hole 211 and the avoidance groove 212 to press the key column 41, realizing the opening and closing of the switch 1. The switch 1 transmits the corresponding electrical signal to the control module of the vehicle to feedback the wearing state of the seat belt.

[0052] Among them, the lock tongue 7, the groove-shaped seat 6, the slot hole of the groove-shaped seat 6, and the pop-up member 8 in the automotive plug lock structure are all prior arts, and the relevant structures and cooperation relationships are not specifically described in this application.

[0053] The technical features of the above embodiments can be combined arbitrarily (as long as there is no contradiction in the combination of these technical features). For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written out should also be considered to be within the scope described in this specification.

[0054] In the above text, this application has been described in a relatively specific and detailed manner through general descriptions and specific embodiments. It should be understood that based on the technical concept of this application, several conventional adjustments or further innovations can be made to these specific embodiments; but as long as they do not depart from the technical concept of this application, the technical solutions obtained by these conventional adjustments or further innovations also fall within the protection scope of the claims of this application.

Claims

1. A switch button structure, the switch comprising a shell connected to a mounting bracket, a first terminal connected to an inner cavity of the shell, a second terminal connected to the inner cavity of the shell, a third terminal connected to the inner cavity of the shell, a spring connected to one end of the first terminal and in contact with the third terminal, and a button connected to the spring, the top surface of the shell is provided with a button hole connected to the inner cavity of the shell, the button passes through the button hole, and is characterized in that: The key structure includes an elastic member connected to the top surface of the shell and a key column connected to the elastic member, the elastic member and the top surface of the shell form a sealed cavity, the end of the key passing through the key hole is located in the sealed cavity, the elastic member is formed with a pressing surface that matches the key on the inner wall of the sealed cavity, and a pressing gap is provided between the pressing surface and the key so that the key column squeezes the elastic member and the pressing surface abuts against the key.

2. The key structure according to claim 1, characterized in that: One end of the elastic member away from the key column is connected with a connecting sleeve for being sleeved on the outer wall of the shell, and the connecting sleeve is interference fit with the outer wall of the shell.

3. The key structure according to claim 2, characterized in that: The key column is a hollow column with an open end, one end of the elastic member is connected to the connecting sleeve, and the other end is connected to the open end of the hollow column along the circumferential direction of the key column, the inner side surface of the elastic member close to the open end of the hollow column forms the pressing surface, the connecting sleeve is sleeved on the outer side wall of the shell, the central axis of the key column coincides with the central axis of the elastic member, and the extension line of the central axis of the key column coincides with the key.

4. The key structure according to claim 3, characterized in that: The key column is a rigid part, and the connecting sleeve and the elastic part are both made of elastic material.

5. The key structure according to claim 3, characterized in that: The key column, the elastic member and the connecting sleeve are integrally formed and are all made of elastic material. The wall thickness of the elastic member is smaller than the wall thickness of the key column.

6. The key structure according to claim 4 or 5, characterized in that: The elastic material is silicone.

7. A switch, characterized in that: A switch button structure comprising the switch according to any one of claims 1 to 6, wherein the mounting bracket is connected to a limiting sleeve, the key column is located in a sleeve cavity of the limiting sleeve, a clearance hole is provided on the top surface of the limiting sleeve, and a avoidance groove connected to the sleeve cavity of the limiting sleeve is provided on the side surface of the limiting sleeve.

8. A car mortise lock structure, characterized in that: It includes a locking tongue connected to a safety belt, a slotted seat installed on a car seat, a pop-up piece slidably connected to a slotted hole of the slotted seat and used to cooperate with the locking tongue, a switch connected to the slotted seat and a mounting bracket connected to the slotted seat, wherein the switch is the switch according to claim 7, the pop-up piece is integrally formed with a paddle, the locking tongue is used to penetrate the slotted hole and abut against the pop-up piece, driving the pop-up piece to move toward the switch, so that the paddle passes through the clearance hole and the avoidance groove of the switch to press the key column.

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