Novel gear switch

Abstract

The utility model discloses a novel gear switch, which comprises a shell, a plug assembly and an ejector rod assembly, the plug assembly and the ejector rod assembly are arranged at two ends of the shell, the plug assembly comprises a socket, at least a pair of static contact pieces are arranged in the shell, and a moving contact which is electrically connected with the pair of static contact pieces to form a normally closed switch is further arranged in the shell. At least part of the ejector rod assembly is located outside the shell to form an operation end for a user to press, the moving contact is arranged between the two corresponding static contact pieces, and a first reset spring enabling the moving contact to be electrically connected with the two static contact pieces is arranged between the socket and the moving contact. According to the utility model, the number of the moving contacts is reduced, the manufacturing cost is reduced, in addition, an independently stressed contact structure is designed, each moving contact corresponds to a return spring, the return spring is arranged in the return area, the return spring is arranged in the return area, the return area is arranged in the return area, the return area is arranged in the return area, and the moving contact is arranged in the return area. And breakpoint faults caused by factors such as installation errors, part sizes and planeness can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile gearboxes, in particular to a novel gear switch. Background Art

[0002] The automatic transmission gear switch is a sensor that senses the gear position of the gearbox. After transmitting the gear position of the gearbox to the automatic transmission control unit, the automatic transmission control unit performs the gear shift operation according to the gear position. The gear switch is composed of a return spring, a spring sheet, and a contact. According to the required number of speed gears, the required number of switches is set to form an electrically operated shift combination switch. When the power is connected to one of the groups, the contacts of the group of electric switches are connected, and the automatic transmission control unit controls the gear change according to the connection signal.

[0003] The existing gear switch realizes the dual-channel output function through the contact / separation of four pairs of silver contacts. This structure has the following disadvantages: ① There are too many silver contacts, and the production cost is high; ② The silver contact groups are not independent of each other, and are easily affected by installation errors, part size, flatness and other factors during operation, resulting in some groups of contacts not conducting and outputting erroneous signals. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide a new type of gear switch.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a new type of gear switch, including a shell, a plug assembly and a push rod assembly arranged at both ends of the shell, the plug assembly including a socket at least partially limited in the shell, at least a pair of static contacts are arranged in the shell, and a moving contact electrically connected to the pair of static contacts to form a normally closed switch is also provided, the push rod assembly is at least partially located outside the shell to form an operating end for a user to press, the moving contact is arranged between the corresponding two static contacts, a first reset spring is arranged between the socket and the moving contact to electrically connect the moving contact to the two static contacts, a yield area is formed between the corresponding two static contacts and the moving contact is located at the yield area, a contact push rod linked to the push rod assembly is also provided and the contact push rod corresponds to the position of the moving contact, and the contact push rod can pass through the yield area between the two static contacts to push the moving contact open.

[0006] As a preferred technical solution of the utility model, the two static contact pieces corresponding to each moving contact extend toward one side of the clearance area to form a bending portion, and the two bending portions are arranged at intervals, the two bending portions are inclined toward one end away from the static contact piece, and the width of the two bending portions gradually decreases from top to bottom, and the moving contact is spanned between the two bending portions.

[0007] As a preferred technical solution of the utility model, the clearance area includes a clearance opening formed between the lower ends of the two bending parts, and the width of the clearance opening is smaller than the width of the moving contact, and the width of the clearance opening is adapted to the contact push rod.

[0008] As a preferred technical solution of the utility model, a first spring hole for installing a first reset spring is opened at one end of the socket located in the housing, and the first spring hole is coaxially arranged with the moving contact.

[0009] As a preferred technical solution of the utility model, a bracket is further provided which is longitudinally limited between the push rod assembly and the socket, the contact push rod is movably mounted on the bracket, and a second reset spring is provided between the contact push rod and the socket.

[0010] As a preferred technical solution of the utility model, a diaphragm is arranged between the bracket and the push rod assembly, and the diaphragm is a polyimide diaphragm, which divides the inner cavity of the shell into two upper and lower chambers isolated from each other.

[0011] As a preferred technical solution of the utility model, an O-ring is provided between the bracket and the push rod assembly.

[0012] As a preferred technical solution of the utility model, a second spring hole for installing a second reset spring is opened at one end of the socket located in the shell, and the contact push rod includes a center rod inserted in the second spring hole, a movable plate and a movable rod coaxially arranged with the center rod, the center rod and the movable rod are located at both ends of the movable plate, a movable groove is provided on the bracket, the movable plate is located in the movable groove and the movable plate corresponds to the yield area, the movable rod is inserted in the center hole of the groove and the movable rod is linked to the top rod assembly.

[0013] As a preferred technical solution of the utility model, the push rod assembly includes an operating rod, a movable block, and a movable sleeve. The movable block and the movable sleeve are slidably matched and a third return spring is arranged between the two. The operating rod slides longitudinally in the shell and the inner end of the operating rod is limited to the shell. A fourth return spring is arranged between the operating rod and the movable block.

[0014] As a preferred technical solution of the utility model, a first mounting cavity and a second mounting cavity are provided in the shell, and a mounting step is formed between the first mounting cavity and the second mounting cavity, the lower end of the bracket is mounted on the mounting step, the upper end of the bracket is mounted on the inner end surface of the socket, the push rod assembly is arranged in the second mounting cavity, a third spring hole for the third spring to be installed is provided in the movable sleeve, the upper end part of the movable block is limited to be located in the third spring hole, a protrusion is provided at the lower end of the movable block, a fourth spring hole for the protrusion to be inserted is provided at the upper end of the operating rod, the fourth spring is limited to be located between the fourth spring hole and the protrusion, and a movable distance is left at one end between the movable block and the operating rod, a limiting step located below the movable block is provided on the inner wall of the second mounting cavity, and a limiting ring is provided on the upper end of the operating rod and is located on the limiting step.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] A normally closed switch is formed by electrically connecting a moving contact with a pair of stationary contacts, thereby reducing the number of moving contacts and lowering manufacturing costs. In addition, a contact structure in which the moving contact is subjected to independent force is designed, and each moving contact corresponds to a first reset spring, so that the moving contact can be pre-pressed on the stationary contact under the action of its own first reset spring, thereby avoiding breakpoint failures caused by installation errors, part dimensions, flatness and other factors. The structure is a bridge-type connection design of stationary contact piece-moving contact piece-stationary contact piece. The moving contact and the stationary contact piece are in over-travel pre-pressed contact, and the connection is reliable. Inclined bending portions are provided on the inner sides of the two corresponding stationary contacts. During use, the moving contact is located in the yield area and a moving contact is electrically connected to the bending portions on both sides at the same time, so that the contact ablation self-cleaning function can be achieved, and a matching contact surface will be formed at the ablation position, and the contact effect is good.

[0017] Traditional gear switches are sealed with flat gaskets made of nitrile rubber. Based on the characteristics of the nitrile rubber material itself, the flat gasket can block water vapor but cannot block oil and gas. The present application arranges a sealing structure including a diaphragm made of polyimide material and an O-ring made of nitrile rubber between the bracket and the push rod assembly, which can prevent oil and gas from entering the upper chamber (first installation chamber) from the lower chamber (second installation chamber), thereby avoiding product failure caused by oil and gas penetration. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0020] Figure 3 It is a schematic diagram of the structure of the cooperation between the moving contact and a pair of stationary contact pieces in the utility model;

[0021] Figure 4It is a structural schematic diagram of the contact push rod in the utility model;

[0022] Figure 5 It is a top view of the utility model;

[0023] Figure 6 It is a cross-sectional view of AA of the utility model.

[0024] 1. The present invention relates to a type of contact pin which is provided with a plurality of movable members, wherein the movable members are provided with a plurality of movable blocks and a plurality of movable sleeves. The movable members are provided with a plurality of movable sleeves and a plurality of movable sleeves. The movable members are provided with a plurality of movable sleeves and a plurality of movable sleeves. The movable members are provided with a plurality of movable sleeves and a plurality of movable sleeves. The movable members are provided with a plurality of movable sleeves and a plurality of movable sleeves. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments and drawings, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0026] The specific embodiments of the present utility model are described below in conjunction with the accompanying drawings.

[0027] like Figures 1 to 6A new type of gear switch shown in the figure includes a shell 1, a plug assembly 2 and a push rod assembly 3 arranged at both ends of the shell 1, the plug assembly 2 includes a socket 4 at least partially confined in the shell 1, at least a pair of static contacts 6 are arranged in the shell 1, and a moving contact 9 electrically connected to the pair of static contacts 6 to form a normally closed switch is also provided, the push rod assembly 3 is at least partially located outside the shell 1 to form an operating end 8 for a user to press, characterized in that: the moving contact 9 is arranged between the corresponding two static contacts 6, a first return spring 10 is arranged between the socket 4 and the moving contact 9 to electrically connect the moving contact 9 to the two static contacts 6, a yield area 12 is formed between the corresponding two static contacts 6 and the moving contact 9 is located at the yield area 12, and a contact push rod 14 linked to the push rod assembly 3 is also provided and the contact push rod 14 corresponds to the position of the moving contact 9, and the contact push rod 14 can pass through the yield area 12 between the two static contacts 6 to push the moving contact 9 open.

[0028] In this embodiment, there are two pairs of static contact pieces 6, a total of four pieces, four terminals 5 are provided on the socket 4, and the lower ends of the terminals 5 are electrically connected to the static contact pieces 6, two moving contacts 9 and two pairs of static contact pieces 6 form two groups of normally closed switches, and the operating end 8 of the push rod assembly 3 is pressed to disconnect the two groups of normally closed switches and output two groups of disconnection signals, two groups of moving contacts 9 are provided, and each group of moving contacts 9 corresponds to the two static contact pieces 6 respectively. In this embodiment, a first spring hole 7 is opened at one end of the socket 4 located in the shell 1, and a guide sleeve 37 is provided in the first spring hole 7. The moving contact 9 is fixed to the lower end of the guide sleeve 37, one end of the first return spring 10 is installed in the guide sleeve 37, and the other end of the first return spring 10 is against the upper end surface of the first spring hole 7, the first spring hole 7 is coaxially arranged with the moving contact 9, and the moving contact 9 is preferably a silver contact.

[0029] The two stationary contact pieces 6 corresponding to each moving contact 9 extend toward one side of the clearance zone 12 to form a bending portion 11, and the two bending portions 11 are arranged at intervals, and the two bending portions 11 are inclined toward one end away from the stationary contact piece 6, and the width of the two bending portions 11 gradually decreases from top to bottom, and the moving contact 9 is spanned between the two bending portions 11. The clearance zone 12 includes a clearance opening 13 formed between the lower ends of the two bending portions 11, and the width of the clearance opening 13 is smaller than the width of the moving contact 9, and the width of the clearance opening 13 is adapted to the contact push rod 14.

[0030] A normally closed switch is formed by electrically connecting a moving contact 9 with a pair of stationary contact pieces 6, so that the number of moving contacts 9 is reduced and the manufacturing cost is reduced. In addition, a contact structure in which the moving contact 9 is subjected to force individually is designed, and each moving contact 9 corresponds to a first reset spring 10, so that the moving contact 9 can be pre-pressed on the stationary contact piece 6 under the action of its own first reset spring 10, so that breakpoint failures caused by installation errors, part dimensions, flatness and other factors can be avoided. The structure is a bridge-type connection design of stationary contact piece 6-moving contact 9-stationary contact piece 6. The moving contact 9 and the stationary contact piece 6 are in over-travel pre-pressed contact, and the connection is reliable. Inclined bending portions 11 are provided on the inner sides of the two corresponding stationary contact pieces 6. During use, the moving contact 9 is located in the yield area 12 and one moving contact 9 is electrically connected to the bending portions 11 on both sides at the same time, so that the function of contact ablation self-cleaning can be achieved, and a matching contact surface will be formed at the ablation position, and the contact effect is good.

[0031] A bracket 15 is also provided which is longitudinally limited between the push rod assembly 3 and the socket 4 . The contact push rod 14 is movably mounted on the bracket 15 . A second return spring 16 is provided between the contact push rod 14 and the socket 4 .

[0032] A diaphragm 17 is arranged between the bracket 15 and the push rod assembly 3. The diaphragm 17 is a polyimide diaphragm 17. The diaphragm 17 divides the inner cavity of the shell 1 into two upper and lower isolated chambers. An O-ring 18 is arranged between the bracket 15 and the push rod assembly 3. The O-ring 18 is preferably made of nitrile rubber, but is not limited to this material. In this embodiment, the diaphragm 17 and the O-ring 18 are arranged up and down.

[0033] The conventional gear switch is sealed with a flat gasket made of nitrile rubber. Based on the characteristics of the nitrile rubber material itself, the flat gasket can block water vapor but cannot block oil and gas. The present application provides a sealing structure including a diaphragm 17 made of polyimide material and an O-ring 18 made of nitrile rubber between the bracket 15 and the push rod assembly 3, which can prevent oil and gas from entering the upper chamber (first installation chamber 29) from the lower chamber (second installation chamber 30), thereby avoiding product failure caused by oil and gas penetration.

[0034] A second spring hole 19 for installing a second reset spring 16 is provided at one end of the socket 4 located in the shell 1. The contact push rod 14 includes a center rod 20 inserted in the second spring hole 19, a movable piece 21 and a movable rod 22 coaxially arranged with the center rod 20. The center rod 20 and the movable rod 22 are located at both ends of the movable piece 21. A movable groove 23 is provided on the bracket 15. The movable piece 21 is located in the movable groove 23 and the movable piece 21 corresponds to the yielding opening 13. The movable rod 22 is inserted in the center hole of the groove and the movable rod 22 is linked to the top rod assembly 3.

[0035] The ejector rod assembly 3 includes an operating rod 24, a movable block 25, and a movable sleeve 26. The movable block 25 is slidably engaged with the movable sleeve 26, and a third return spring 27 is provided between them. The operating rod 24 longitudinally slides within the housing 1, and the inner end of the operating rod 24 is limited within the housing 1. A fourth return spring 28 is provided between the operating rod 24 and the movable block 25. The third return spring 27 and the fourth return spring 28 are coaxially arranged.

[0036] A first installation cavity 29 and a second installation cavity 30 are provided within the housing 1, and an installation step 31 is formed between the first installation cavity 29 and the second installation cavity 30. The lower end of the bracket 15 is placed on the installation step 31, the upper end of the bracket 15 is placed on the inner end face of the socket 4, the ejector rod assembly 3 is arranged within the second installation cavity 30. A third spring hole 32 for installing the third spring is provided within the movable sleeve 26. The upper part of the movable block 25 is limited within the third spring hole 32. A convex block 33 is provided at the lower end of the movable block 25. A fourth spring hole 34 for the convex block 33 to insert is provided at the upper end of the operating rod 24. The fourth spring is limited between the fourth spring hole 34 and the convex block 33. There is a certain active distance between the movable block 25 and the operating rod 24. A limiting step 35 is provided on the inner wall of the second installation cavity 30 below the movable block 25. A limiting ring 36 is provided at the upper end of the operating rod 24 and is placed on the limiting step 35.

[0037] Working principle: ① In the initial state, the moving contact 9 is in contact with the static contact piece 6, and the switch outputs two groups of closed signals. ② When the exposed part of the ejector rod assembly 3 (equivalent to a button) is subjected to an external thrust, the operating rod 24 moves upward against the resistance of the fourth return spring 28 until the operating rod 24 comes into contact with the movable block 25. The switch does not act during this stage. ③ The operating rod 24 continues to move upward. Since the force value of the third return spring 27 is much greater than the force values of the first return spring 10 and the second return spring 16, during this stage, the ejector rod assembly 3 pushes the contact push rod 14 on the other side of the diaphragm 17 upward. At this time, the contact push rod 14 separates the moving contact 9 from the static contact piece 6, and the switch outputs two groups of open signals. ④ The operating rod 24 continues to move upward. When the contact push rod 14 is in contact with the socket 4, the operating rod 24 begins to move upward against the third return spring 27. The switch does not act during this stage until the outer end of the operating rod 24 is completely immersed in the housing 1 and the operating rod 24 reaches its maximum stroke.

[0038] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A new type of gear shift switch, comprising a housing (1), a plug assembly (2) and a push rod assembly (3) provided at both ends of the housing (1). The plug assembly (2) includes a socket (4) at least partially limited within the housing (1). At least a pair of static contact pieces (6) are provided within the housing (1), and a moving contact (9) electrically connected to the pair of static contact pieces (6) to form a normally closed switch is further provided. At least a part of the push rod assembly (3) is located outside the housing (1) to form an operation end (8) for the user to press. It is characterized in that: The moving contact (9) is arranged between two corresponding static contact pieces (6). A first return spring (10) for electrically connecting the moving contact (9) with the two static contact pieces (6) is arranged between the socket (4) and the moving contact (9). A clearance area (12) is formed between the two corresponding static contact pieces (6), and the moving contact (9) is located at the clearance area (12). A contact push rod (14) linked with the ejector rod assembly (3) is further provided, and the contact push rod (14) corresponds to the position of the moving contact (9). The contact push rod (14) can pass through the clearance area (12) between the two static contact pieces (6) to push open the moving contact.

2. The novel gear shift switch according to claim 1, characterized in that: The two static contact pieces (6) corresponding to each moving contact (9) extend towards the clearance area (12) to form bending parts (11). The two bending parts (11) are arranged at intervals. The two bending parts (11) incline towards the end away from the static contact pieces (6), and the widths of the two bending parts (11) gradually decrease from top to bottom. The moving contact (9) is placed between the two bending parts (11).

3. The novel gear shift switch according to claim 2, characterized in that: The clearance area (12) includes a clearance opening (13) formed between the lower ends of the two bending parts (11). The width of the clearance opening (13) is smaller than the width of the moving contact (9). The width of the clearance opening (13) is adapted to the contact push rod (14).

4. The novel gear shift switch according to claim 1 or 2 or 3, characterized in that: One end of the socket (4) located inside the housing (1) is provided with a first spring hole (7) for installing the first return spring (10). The first spring hole (7) is coaxially arranged with the moving contact (9).

5. The novel gear shift switch according to claim 1 or 2 or 3, characterized in that: A bracket (15) longitudinally limited between the ejector rod assembly (3) and the socket (4) is further provided. The contact push rod (14) is movably installed on the bracket (15). A second return spring (16) is arranged between the contact push rod (14) and the socket (4).

6. The novel gear shift switch according to claim 5, characterized in that: A diaphragm (17) is arranged between the bracket (15) and the ejector rod assembly (3). The diaphragm (17) is a polyimide diaphragm (17). The diaphragm (17) divides the inner cavity of the housing (1) into two mutually isolated chambers, upper and lower.

7. The novel gear shift switch according to claim 5, characterized in that: An O-ring (18) is arranged between the bracket (15) and the ejector rod assembly (3).

8. The novel gear shift switch according to claim 5, characterized in that: One end of the socket (4) located inside the housing (1) is provided with a second spring hole (19) for installing the second return spring (16). The contact push rod (14) includes a central rod (20) inserted into the second spring hole (19), a movable piece (21), and a movable rod (22) coaxially arranged with the central rod (20). The central rod (20) and the movable rod (22) are located at both ends of the movable piece (21). An activity groove (23) is arranged on the bracket (15). The movable piece (21) is located in the activity groove (23) and the movable piece (21) corresponds to the clearance area (12). The movable rod (22) is inserted into the central hole of the groove and the movable rod (22) is linked with the ejector rod assembly (3).

9. The novel gear shift switch according to claim 6 or 7 or 8, characterized in that: The ejector rod assembly (3) includes an operating rod (24), a movable block (25), and a movable sleeve (26). The movable block (25) is slidably engaged with the movable sleeve (26), and a third return spring (27) is provided between them. The operating rod (24) longitudinally slides in the housing (1), and the inner end of the operating rod (24) is limited within the housing (1). A fourth return spring (28) is provided between the operating rod (24) and the movable block (25).

10. The novel gear shift switch according to claim 9, characterized in that: A first installation cavity (29) and a second installation cavity (30) are provided in the housing (1), and an installation step (31) is formed between the first installation cavity (29) and the second installation cavity (30). The lower end of the bracket (15) is placed on the installation step (31), the upper end of the bracket (15) is placed on the inner end face of the socket (4). The ejector rod assembly (3) is arranged in the second installation cavity (30). A third spring hole (32) for installing the third spring is provided in the movable sleeve (26). The upper part of the movable block (25) is limited within the third spring hole (32). A convex block (33) is provided at the lower end of the movable block (25). A fourth spring hole (34) for inserting the convex block (33) is provided at the upper end of the operating rod (24). The fourth spring is limited between the fourth spring hole (34) and the convex block (33). There is a certain movable distance between the movable block (25) and the operating rod (24). A limiting step (35) is provided on the inner wall of the second installation cavity (30) below the movable block (25). A limiting ring (36) is provided at the upper end of the operating rod (24) and is placed on the limiting step (35).

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