Signal switch

Abstract

The utility model relates to a signal switch, comprising a housing; the circuit mechanism comprises a circuit board assembly, a first contact and a second contact; the movable frame is movably arranged in the shell; the circuit board assembly comprises a circuit board, a first conductive contact piece and a second conductive contact piece, the first conductive contact piece and the second conductive contact piece are arranged on the circuit board, the first contact is electrically connected with the first conductive contact piece through contact, and the second contact is electrically connected with the second conductive contact piece through contact. According to the utility model, the two contacts forming the contact switch are connected with the circuit board in a non-welding manner, so that the product assembly is more convenient and faster, the full-automatic production is realized, the production efficiency is improved, and the cost is reduced; when the signal switch is used in a vibration occasion, the elastic connection between the moving contact and the circuit board and the static contact and the circuit board avoids the risk of breakage or falling of the electric connection parts between the moving contact and the circuit board and between the static contact and the circuit board in a traditional welding mode, the elastic connection enables the electric connection to be more reliable, and the safety of equipment and human bodies is ensured.

Description

Technical Field

[0001] The utility model relates to a signal switch. Background Art

[0002] Generally, for a signal switch with a circuit board, the linkage of the moving contact or the moving contact and the static contact are directly welded to the circuit board. This welding method makes the whole assembly process of the product complex, is not conducive to automated production, and has a high production cost. In addition, if an elastic contact is welded to the circuit board, the material properties of the contact are reduced due to the high temperature during the welding process, and the service life of the switch will be reduced. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the disadvantages and deficiencies existing in the prior art, and to provide a signal switch.

[0004] The technical solution adopted by the utility model is as follows: A signal switch includes:

[0005] A housing;

[0006] A circuit mechanism, including a circuit board assembly, a first contact, and a second contact;

[0007] A movable frame, which is movably arranged in the housing, and the first contact and the second contact can be closed / opened by moving the movable frame;

[0008] The circuit board assembly includes a circuit board and a first conductive contact piece and a second conductive contact piece arranged on the circuit board. The first contact forms an electrical connection with the first conductive contact piece through contact, and the second contact forms an electrical connection with the second conductive contact piece through contact.

[0009] An elastic structure is provided, and the elastic force of the elastic structure makes a holding pressure formed between the first contact and the first conductive contact piece and a holding pressure formed between the second contact and the second conductive contact piece.

[0010] The first contact includes a first contact leg, and the first contact leg is a metal spring piece structure. Under the action of its own elastic force, a holding pressure is formed between the first contact and the first conductive contact piece;

[0011] The second contact includes a second contact leg, and the second contact leg is a metal spring piece structure. Under the action of the elastic force of the first contact leg itself, a holding pressure is formed between the second contact and the second conductive contact piece.

[0012] Both the first contact and the second contact are integrally made of elastic metal materials.

[0013] The housing includes a base and an upper cover. The first contact has a first fixing part fixedly connected to the base and a first contact leg connected to the first fixing part, and the first contact leg faces the upper cover;

[0014] The second contact has a second fixing part fixedly connected to the base and a second contact leg connected to the second fixing part, and the second contact leg is arranged towards the upper cover;

[0015] Under the action of the upper cover, the circuit board forms a pressure on the first contact leg and the second contact leg to deform the first contact leg and the second contact leg.

[0016] The first fixing part is an L-shaped flap, and a first positioning groove adapted to the shape of the first fixing part is provided in the base. The first fixing part is inserted into the first positioning groove to form a fixed connection;

[0017] The second fixing part is an L-shaped flap, and a second positioning groove adapted to the shape of the second fixing part is provided in the base. The second fixing part is inserted into the second positioning groove to form a fixed connection.

[0018] The first contact is a static contact. A first connecting piece is connected to the side of the first fixing part away from the first contact leg, and a static contact point is provided near one end of the first connecting piece away from the first fixing part;

[0019] The second contact is a moving contact. A second connecting piece is connected to the side of the second fixing part away from the second contact leg, and a moving contact point is provided near one end of the second connecting piece away from the second fixing part. The second connecting piece is provided with a first bending part and a second bending part, and the second connecting piece is bent and connected to the second fixing part;

[0020] An actuating block and a limiting block are provided on the movable frame. The second contact is located between the actuating block and the first contact, and the limiting block is located between the first connecting piece and the second connecting piece;

[0021] The movable frame moves in the housing and has a first position and a second position; when the movable frame is in the first position, the limiting block abuts against the second bending part to limit the second contact, so that a separation distance is maintained between the moving contact point and the static contact point; when the movable frame is in the second position, the limiting block leaves the second bending part to release the limitation on the second contact, and the actuating block acts on the first bending part to drive the second connecting piece to move towards the first connecting piece until the moving contact point and the static contact point are connected.

[0022] The circuit mechanism includes a speed regulation slide piece and a signal slide piece. The speed regulation slide piece and the signal slide piece are fixed on the surface of the movable frame facing the circuit board, and a speed regulation contact piece one, a speed regulation contact piece two, a signal contact piece one and a signal contact piece two are respectively provided on the circuit board.

[0023] One end of the movable frame extends out of the housing to form a driving end. A sealing sleeve with a telescopic structure is connected between the movable frame and the housing. The upper end of the sealing sleeve is fixedly sleeved on the outer periphery of the movable frame near the driving end, and its lower end is fixed on the upper end surface of the housing.

[0024] A sealing ring is connected between the movable frame and the housing. The sealing ring is fixed on the inner wall of the housing, and the outer wall of the movable frame is in sliding and sealing fit with the inner wall of the sealing ring;

[0025] At least one annular groove is provided on the inner wall of the sealing ring.

[0026] Compared with the prior art, the utility model has at least the following beneficial effects:

[0027] 1) The two contacts constituting the contact switch are connected to the circuit board without welding, making the product assembly more convenient and fast, facilitating the realization of fully automated production, improving production efficiency and reducing costs;

[0028] 2) The two contacts constituting the contact switch are connected to the circuit board without welding, with fewer parts, lower costs, and improved product service life;

[0029] 3) When the signal switch is used in a vibrating environment, the elastic connection between the moving and static contacts and the circuit board avoids the risk of breakage or detachment at the electrical connection between the moving and static contacts and the circuit board in the traditional welding method. The elastic connection makes the electrical connection more reliable and ensures the safety of the equipment and personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, obtaining other drawings based on these drawings still belongs to the scope of the present utility model.

[0031] Figure 1 It is an exploded view of an embodiment of the present utility model;

[0032] Figure 2 It is a schematic diagram of the internal structure of an embodiment of the present utility model;

[0033] Figure 3 It is a schematic diagram of the structure of the circuit board assembly in an embodiment of the present utility model;

[0034] Figure 4 It is a schematic diagram of the structure of the circuit mechanism in an embodiment of the present utility model;

[0035] Figure 5 It is a schematic diagram of the structure of the base in an embodiment of the present utility model;

[0036] Figure 6 It is a schematic diagram of the mating structure of the base with the first contact and the second contact in an embodiment of the present utility model;

[0037] Figure 7 Among them, (a) is a schematic structural diagram of the first contact, and (b) is a schematic structural diagram of the second contact;

[0038] Figure 8 is a schematic structural diagram of the movable frame in an embodiment of the present invention;

[0039] In the figure, base - 1, first positioning groove - 101, second positioning groove - 102, positioning block - 103, upper cover - 2, sealing gasket - 3, circuit board assembly - 4, circuit board - 401, first conductive contact piece - 402, second conductive contact piece - 403, first speed - regulating contact piece - 404, second speed - regulating contact piece - 405, first signal contact piece - 406, second signal contact piece - 407, first contact - 5, first fixing part - 501, first connecting piece - 502, first contact leg - 503, static contact point - 504, second contact - 6, second fixing part - 601, second connecting piece - 602, second contact leg - 603, moving contact point - 604, first bending part - 605, second bending part - 606, speed - regulating sliding piece - 7, signal sliding piece - 8, movable frame - 9, actuating block - 901, limiting block - 902, sealing sleeve - 10, sealing ring - 11, return spring - 12. Specific embodiments

[0040] To make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0041] It should be noted that all the expressions using "first" and "second" in the embodiments of the present invention are used to distinguish two entities or parameters with the same name but different ones. It can be seen that "first" and "second" are only for the convenience of expression and should not be construed as a limitation on the embodiments of the present invention. This will not be elaborated one by one in the subsequent embodiments.

[0042] The terms of direction and position mentioned in the present invention, such as "up", "down", "front", "rear", "left", "right", "inside", "outside", "top", "bottom", "side", etc., are only with reference to the direction or position of the accompanying drawings. Therefore, the terms of direction and position used are for explaining and understanding the present invention, rather than a limitation on the protection scope of the present invention.

[0043] As Figure 1 shown, a signal switch includes a housing assembly, a circuit mechanism, and a movable frame 9.

[0044] The housing includes a base 1 and an upper cover 2. The base 1 and the upper cover 2 are connected to form the entire housing structure, and a sealing gasket 3 is provided at the connection between the base 1 and the upper cover 2 to ensure the sealing performance.

[0045] The circuit mechanism is fixed inside the housing and includes a circuit board assembly 4, a first contact 5, a second contact 6, a speed regulation slide 7, and a signal slide 8. The circuit board assembly 4, the first contact 5, and the second contact 6 are all fixed inside the housing. The circuit board assembly 4 includes a wire and a circuit board 401.

[0046] The movable frame 9 is movably arranged inside the housing and is located on one side of the circuit board 401. A return spring 12 is provided between the movable frame 9 and the housing to provide a return driving effect.

[0047] As Figures 2 - 4 shown, the circuit mechanism includes a contact switch, a speed regulation mechanism, and a signal switch. Specifically, the contact switch structure includes a first contact 5 and a second contact 6. The first contact 5 and the second contact 6 are respectively conductively and fixedly connected to the circuit board 401. During the movement of the movable frame 9, the first contact 5 and the second contact 6 can be closed / opened, thereby realizing the connection / disconnection of the contact switch. Specifically, the speed regulation mechanism includes a speed regulation slide 7, a first speed regulation contact piece 404, and a second speed regulation contact piece 405. The speed regulation slide 7 is fixed on the surface of the movable frame 9 facing the circuit board 401. The first speed regulation contact piece 404 and the second speed regulation contact piece are arranged on the circuit board 401. The speed regulation slide 7 has at least two legs that straddle between the first speed regulation contact piece 404 and the second speed regulation contact piece 405 on the circuit board 401 and slide between the two as the movable frame 9 moves for speed regulation. Specifically, the signal switch includes a signal slide 8, a first signal contact piece 406, and a second signal contact piece 407. The signal slide 8 is fixed on the surface of the movable frame 9 facing the circuit board 401. The first signal contact piece 406 and the second signal contact piece 407 are arranged on the circuit board 401. The signal slide 8 has at least two legs and slides between the first signal contact piece 406, the second signal contact piece 407, and the vacant position between the first signal contact piece 406 and the second signal contact piece 407 as the movable frame 9 moves.

[0048] In this embodiment, the first contact 5 and the second contact 6 of the present embodiment are directly connected to the circuit board 401 in a non-welding manner. The circuit board 401 is provided with a first conductive contact piece 402 and a second conductive contact piece 403. The first contact 5 has a first fixing portion 501 fixedly connected to the base 1, a first connecting piece 502 connected to the first fixing portion 501, and a first contact leg 503 connected to the first fixing portion 501. The first contact leg 503 forms an electrical connection with the first conductive contact piece 402 through contact. The second contact 6 has a second fixing portion 601 fixedly connected to the base 1, a second connecting piece 602 connected to the second fixing portion 601, and a second contact leg 603 connected to the second fixing portion 601. The second contact leg 603 forms an electrical connection with the second conductive contact piece 403 through contact.

[0049] An elastic structure is also provided. Under the action of the elastic structure, a holding pressure is formed between the first contact 5 and the first conductive contact piece 402, and a holding pressure is formed between the second contact 6 and the second conductive contact piece 403. Specifically, in this embodiment, the first contact leg 503 constitutes a metal spring piece structure with one end fixedly connected to the first fixing part 501 and the other end abuting against the first conductive contact piece 402 of the circuit board 401, and the second contact leg 603 constitutes a metal spring piece structure with one end fixedly connected to the second fixing part 601 and the other end abuting against the second conductive contact piece 403 of the circuit board 401. An additional elastic member, such as a compression spring, can also be used to form the elastic structure.

[0050] In this embodiment, both the first contact 5 and the second contact 6 are integrally made of elastic metal material. That is, the first fixing part 501, the first connecting piece 502, and the first contact leg 503 together constitute a part integrally formed of elastic metal material, and the second fixing part 601, the second connecting piece 602, and the second contact leg 603 together constitute a part integrally formed of elastic metal material. Under the action of the upper cover 2, the circuit board 401 forms a pressure on the first contact leg 503 and the second contact leg 603, causing the first contact leg 503 and the second contact leg 603 to deform.

[0051] Specifically, as Figures 5 - 7 shown, the first fixing part 501 is an L-shaped folding piece, and a first positioning groove 101 adapted to the shape of the first fixing part 501 is provided in the base 1. The first fixing part 501 is inserted into the first positioning groove 101 to form a fixed connection; the second fixing part 601 is an L-shaped folding piece, and a second positioning groove 102 adapted to the shape of the second fixing part 601 is provided in the base 1. The second fixing part 601 is inserted into the second positioning groove 102 to form a fixed connection. Through the L-shaped insertion and positioning structure, the first contact 5 and the second contact 6 can be directly inserted and fixed in the base 1 to prevent the up, down, left, and right positions of the first contact 5 and the second contact 6.

[0052] In this embodiment, as Figure 6 、 Figure 7 shown, the first contact 5 is a static contact, and the second contact 6 is a moving contact. Specifically, a static contact point 504 is provided at one end of the first connecting piece 502 away from the first fixing part 501, a moving contact point 604 is provided at one end of the second connecting piece 602 away from the second fixing part 601, and a first bending part 605 and a second bending part 606 are provided on the second connecting piece 602, and the second connecting piece 602 is bent and connected to the second fixing part 601;

[0053] As Figure 8As shown, an actuating block 901 and a limiting block 902 are provided on the movable frame 9. The second contact 6 is located between the actuating block 901 and the first contact 5, and the limiting block 902 is located between the first connecting piece 502 and the second connecting piece 602.

[0054] The movable frame 9 moves within the housing and has a first position and a second position. When the movable frame 9 is in the first position, the limiting block 902 abuts against the second bending portion 606 to limit the second contact 6, so that a separation distance is maintained between the moving contact 604 and the static contact 504. When the movable frame 9 is in the second position, the limiting block 902 leaves the second bending portion 606 to release the limitation on the second contact 6, and the actuating block 901 acts on the first bending portion 605 to drive the second connecting piece 602 to move towards the first connecting piece 502 until the moving contact 604 and the static contact 504 are connected.

[0055] A positioning block 103 is provided in the base 1 corresponding to the first connecting piece 502 near the end away from the first fixing portion 501. The positioning block 103 forms a resisting and limiting effect on the upper end of the first connecting piece 502 to prevent the side facing the moving contact 604 from deforming, so as to ensure the separation distance between the moving and static contacts.

[0056] One end of the movable frame 9 extends out of the housing to form a driving end. A sealing sleeve 10 with a telescopic structure is connected between the movable frame 9 and the housing. The upper end of the sealing sleeve 10 is fixedly sleeved on the outer periphery of the movable frame 9 near the driving end, and its lower end is fixed on the upper end surface of the housing.

[0057] A sealing ring 11 is connected between the movable frame 9 and the housing. The sealing ring 11 is fixed on the inner wall of the housing, and the outer wall of the movable frame 9 is in sliding and sealing fit with the inner wall of the sealing ring 11. At least one annular groove is provided on the inner wall of the sealing ring 11.

[0058] The sealing sleeve 10 and the sealing ring 11 form a sealing system with a better sealing effect, greatly improving the protection ability of the product, reaching IP67.

[0059] The above-disclosed are only the preferred embodiments of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A signal switch, comprising: A housing; A circuit mechanism, including a circuit board assembly (4), a first contact (5), and a second contact (6); A movable frame (9), which is movably arranged in the housing, and the first contact (5) and the second contact (6) can be closed / opened by moving the movable frame (9); It is characterized in that: The circuit board assembly (4) includes a circuit board (401) and a first conductive contact piece (402) and a second conductive contact piece (403) arranged on the circuit board (401). The first contact (5) is electrically connected to the first conductive contact piece (402) through contact, and the second contact (6) is electrically connected to the second conductive contact piece (403) through contact.

2. The signal switch according to claim 1, wherein: An elastic structure is provided, and the elastic force of the elastic structure causes a holding pressure to be formed between the first contact (5) and the first conductive contact piece (402) and a holding pressure to be formed between the second contact (6) and the second conductive contact piece (403).

3. The signal switch according to claim 2, wherein: The first contact (5) includes a first contact leg (503), and the first contact leg (503) is a metal elastic sheet structure. A holding pressure is formed between the first contact (5) and the first conductive contact piece (402) under the action of the self-elastic force of the first contact leg (503); The second contact (6) includes a second contact leg (603), and the second contact leg (603) is a metal elastic sheet structure. A holding pressure is formed between the second contact (6) and the second conductive contact piece (403) under the action of the self-elastic force of the first contact leg (503).

4. A signal switch according to claim 3, characterized in that: The first contact (5) and the second contact (6) are both integrally made of an elastic metal material.

5. The signal switch according to claim 3, characterized in that: The housing includes a base (1) and an upper cover (2). The first contact (5) has a first fixing portion (501) fixedly connected to the base (1) and a first contact leg (503) connected to the first fixing portion (501), and the first contact leg (503) is arranged facing the upper cover (2); The second contact (6) has a second fixing portion (601) fixedly connected to the base (1) and a second contact leg (603) connected to the second fixing portion (601), and the second contact leg (603) is arranged facing the upper cover (2); Under the action of the upper cover (2), the circuit board (401) forms a pressure on the first contact leg (503) and the second contact leg (603) to deform the first contact leg (503) and the second contact leg (603).

6. The signal switch according to claim 5, characterized in that: The first fixing portion (501) is an L-shaped flap, and a first positioning groove (101) adapted to the shape of the first fixing portion (501) is provided in the base (1). The first fixing portion (501) is inserted into the first positioning groove (101) to form a fixed connection; The second fixing portion (601) is an L-shaped flap, and a second positioning groove (102) adapted to the shape of the second fixing portion (601) is provided in the base (1). The second fixing portion (601) is inserted into the second positioning groove (102) to form a fixed connection.

7. A signal switch according to claim 5, characterized in that: The first contact (5) is a stationary contact. A first connecting piece (502) is connected to a side of the first fixing part (501) away from the first contact leg (503). A stationary contact point (504) is provided near an end of the first connecting piece (502) away from the first fixing part (501). The second contact (6) is a moving contact. A second connecting piece (602) is connected to a side of the second fixing part (601) away from the second contact leg (603). A moving contact point (604) is provided near an end of the second connecting piece (602) away from the second fixing part (601). A first bending part (605) and a second bending part (606) are provided on the second connecting piece (602), and the second connecting piece (602) is bent and connected to the second fixing part (601). An actuating block (901) and a limiting block (902) are provided on the movable frame (9). The second contact (6) is located between the actuating block (901) and the first contact (5), and the limiting block (902) is located between the first connecting piece (502) and the second connecting piece (602). The movable frame (9) moves in the housing and has a first position and a second position. When the movable frame (9) is in the first position, the limiting block (902) abuts against the second bending part (606) to limit the second contact (6) so that a separation distance is maintained between the moving contact point (604) and the stationary contact point (504). When the movable frame (9) is in the second position, the limiting block (902) leaves the second bending part (606) to release the limitation on the second contact (6), and the actuating block (901) acts on the first bending part (605) to drive the second connecting piece (602) to move towards the first connecting piece (502) until the moving contact point (604) and the stationary contact point (504) are connected.

8. A signal switch according to claim 1, characterized in that: The circuit mechanism includes a speed-regulating sliding piece (7) and a signal sliding piece (8). The speed-regulating sliding piece (7) and the signal sliding piece (8) are fixed on a surface of the movable frame (9) facing the circuit board (401). A first speed-regulating contact piece (404), a second speed-regulating contact piece (405), a first signal contact piece (406), and a second signal contact piece (407) are respectively provided on the circuit board (401).

9. A signal switch according to any one of claims 1-8, characterized in that: One end of the movable frame (9) extends out of the housing to form a driving end. A sealing sleeve (10) with a telescopic structure is connected between the movable frame (9) and the housing. The upper end of the sealing sleeve (10) is fixedly sleeved on the outer periphery of the movable frame (9) near the driving end, and its lower end is fixed on the upper end surface of the housing.

10. A signal switch according to claim 9, characterized in that: A sealing ring (11) is connected between the movable frame (9) and the housing. The sealing ring (11) is fixed on the inner wall of the housing, and the outer wall of the movable frame (9) is in sliding and sealing fit with the inner wall of the sealing ring (11). At least one annular groove (1101) is provided on the inner wall of the sealing ring (11).

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