Two-way conversion type small travel switch

Abstract

A two-way conversion type small travel switch comprises a base, a shell, a contact assembly, a compression spring, a pressing handle and a leading-out wire, the shell is arranged on the base, the contact assembly is arranged on a boss of the base and fixed in the shell, the leading-out wire penetrates through the base and is connected with the contact assembly, the pressing handle enters the shell from the upper end of the shell, and the pressing handle is connected with the base through the compression spring. The pressure spring is connected with the contact assembly, the contact assembly is arranged in a mode of combining a circuit structure and a mechanical mechanism, the printed board assembly is arranged by adopting a symmetrical structure, and a filamentous part is adopted as an elastic connecting part, so that the overall size of the switch is reduced while the requirements of double-path conversion and large stroke are ensured; the conditions of large occupied space, easy deformation, easy fatigue and the like are avoided, and the reliability of the switch life is improved.

Description

Technical Field

[0001] The invention relates to the technical field of switch control elements, in particular to a dual-circuit conversion type small travel switch. Background Art

[0002] In electrical control systems, the role of travel switches is to accurately achieve positioning control and position state detection, and to control the travel and limit protection of mechanical equipment. It is an electromechanical component that uses displacement as input excitation. Its main function is to convert mechanical displacement into electrical signals, so that the operating state of the control system can be changed, thereby controlling mechanical movements. It is widely used in various types of mechanical production equipment, automobiles, aviation and aerospace. With the further development of science and technology and actual market demand, requirements such as small size, large travel and multiple margins have become the development trend of travel switches.

[0003] However, most of the current travel switches that meet the requirements of multi-channel conversion and large stroke mostly adopt multiple microswitch combinations and circular reed arrangement solutions. The multiple microswitch combination solution needs to consider the size and stroke differences of the micro switches, and it is difficult to reduce the volume in design; although the circular reed arrangement solution can achieve multiple margins and large stroke requirements, the reliability and insulation requirements of the reed material still make it difficult to reduce the product volume, making it impossible to meet user assembly needs.

[0004] For example, the patent document with publication number CN218123241U discloses a dual-path trigger large-travel switch assembly, including a housing, an electrical connector and at least one trigger structure, the trigger structure including a push rod assembly, a push mechanism, a micro switch and internal leads, the push rod assembly and the electrical connector are respectively installed on the housing through the wall, a reed is provided on the micro switch, the middle part of the push mechanism is rotatably installed in the housing, one end of the push mechanism is arranged on the travel path of the push rod assembly, the other end of the push mechanism is fitted with the reed, the micro switch is electrically connected to the electrical connector through the internal lead, pressing the push rod assembly drives the push mechanism to rotate, and then pressing the reed controls the micro switch state conversion, which can be triggered independently in one channel or triggered simultaneously in two channels, and can transmit at least four sets of conversion signals.

[0005] For example, the patent document with publication number CN103943398B discloses a long-stroke micro switch, which includes an outer shell and a first terminal group, a second terminal group, a button transmission mechanism, a spring transmission mechanism connected to the button transmission mechanism, etc., wherein the button transmission mechanism includes a first button, a first spring limited between the bottom of the first button and the outer shell, and the side wall of the first button located in the outer shell has a laterally arranged pressing portion, and the pressing portion is located above the spring transmission mechanism; when the button is pressed, the first spring is deformed, and the button transmission mechanism transmits the pressing action to the spring transmission mechanism through the pressing portion, thereby changing the terminal connection relationship in the second terminal group. The change in the terminal connection relationship in the first terminal group ultimately realizes the electrical connection control of the external circuit.

[0006] In summary, the current prior art generally uses spring materials which makes it difficult to reduce the volume of the product, making it impossible to meet the assembly requirements of users for small volume, large stroke, and multiple margins. Summary of the invention

[0007] In view of the problems existing in the prior art, the present invention provides a dual-circuit conversion type small travel switch.

[0008] The present invention is implemented in this way, providing a dual-way conversion type small travel switch including a base, a shell, a contact assembly, a compression spring, a handle and a lead-out wire, wherein the shell is arranged on the base, the contact assembly is arranged on a boss of the base and fixed inside the shell, the lead-out wire passes through the base and is connected to the contact assembly, and the handle enters the interior of the shell from the upper end of the shell and is connected to the contact assembly through the compression spring.

[0009] Furthermore, the contact assembly includes a first printed circuit board assembly, a second printed circuit board assembly, a spring wire A, a spring wire B, a spring wire C, a spring wire D, a base and a rivet. The first printed circuit board assembly and the second printed circuit board assembly are fixed to the left and right sides of the base by rivets. The spring wire A and the spring wire B are arranged on the first printed circuit board assembly, and the spring wire C and the spring wire D are arranged on the second printed circuit board assembly.

[0010] Furthermore, the first printed circuit board assembly includes a printed circuit board, and a group of conductive pillars A and conductive pillars B are respectively arranged on the left and right sides of the printed circuit board, and the conductive pillars B are arranged above the conductive pillars A.

[0011] Furthermore, the conductive column A and the conductive column B are connected to the internal circuit of the printed circuit board by welding, the conductive column B is connected to the No. 2 hole of the internal circuit as a common end, the conductive column A on the left is connected to the No. 4 hole of the internal circuit as a normally open end, and the conductive column A on the right is connected to the No. 3 hole of the internal circuit as a normally closed end.

[0012] Furthermore, a square groove is provided in the middle of the upper end of the printed circuit board, and the compression spring is arranged in the square groove.

[0013] Furthermore, arch-shaped grooves are respectively provided from the lower edge of the printed circuit board to the contact point leading out of the common terminal, the contact point leading out of the normally open terminal, and the contact point leading out of the normally closed terminal.

[0014] Furthermore, one end of the spring wire A is fixed at the upper left of the printed circuit board, and the other end is S-shaped to bypass the conductive pillars A and B on the left side of the printed circuit board. One end of the spring wire B is fixed at the upper right of the printed circuit board, and the other end is reverse S-shaped to bypass the conductive pillars A and B on the right side of the printed circuit board.

[0015] Furthermore, the first printed circuit board assembly and the second printed circuit board assembly are symmetrical components, the spring wire C corresponds to the spring wire B, and the spring wire D corresponds to the spring wire A.

[0016] Furthermore, the base and the shell are connected as a whole through laser sealing.

[0017] Furthermore, the lead wire is connected to the common terminal, the normally open terminal and the normally closed terminal of the contact assembly.

[0018] In summary, the beneficial effects of the present invention are:

[0019] 1. The contact assembly of the present invention adopts a combination of circuit structure and mechanical mechanism to solve the problem of insulation of the full mechanical mechanism, which causes the overall volume to be large due to the large space occupied, and the problem that the full circuit structure cannot output input values ​​such as force and displacement through mechanical conversion;

[0020] 2. The present invention connects the conversion mechanism and the output end through the internal circuit of the printed circuit board, adopts a symmetrical structural design, and can achieve the dual-channel conversion requirement through one actuating mechanism without adding other components; and avoids the problem of increased volume caused by the circular arrangement of reeds requiring multi-layer distribution to achieve conversion, and compresses the switch shape to the maximum extent, while ensuring the dual-channel conversion and large stroke requirements, while reducing the overall volume of the switch;

[0021] 3. The present invention adopts filamentary parts as elastic connecting parts, avoiding the situation that commonly used sheet-like parts occupy a large space, are easy to deform, and are prone to fatigue, thereby further reducing the volume and improving the life reliability of the switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below.

[0023] Figure 1 It is a schematic diagram of the external structure of the present invention;

[0024] Figure 2It is a schematic diagram of the internal structure on the left side of the present invention;

[0025] Figure 3 It is a schematic diagram of the internal structure on the right side of the present invention;

[0026] Figure 4 is a schematic diagram of the front structure of the contact assembly of the present invention;

[0027] Figure 5 It is a schematic diagram of the left side structure of the contact assembly of the present invention;

[0028] Figure 6 It is a schematic diagram of the right side structure of the contact assembly of the present invention;

[0029] Figure 7 It is a schematic diagram of the front structure of the printed circuit board assembly of the present invention;

[0030] Figure 8 It is a schematic diagram of the left side structure of the printed circuit board assembly of the present invention;

[0031] Fig. 9 It is a schematic diagram of the internal circuit connection of the printed circuit board of the present invention;

[0032] Description of the accompanying drawings: 1-base, 2-housing, 3-contact assembly, 4-compression spring, 5-handle, 6-screw, 7-lead wire, 8-first printed circuit board assembly, 9-spring wire A, 10-spring wire B, 11-rivet, 12-base, 13-second printed circuit board assembly, 14-spring wire C, 15-spring wire D, 16-printed board, 17-conductive column A, 18-conductive column B. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Combination Figures 1 to 9 The figure shows a specific embodiment of a dual-way conversion type small travel switch provided by the present invention, and the specific contents are as follows:

[0035] like Figure 1-Figure 3As shown, the dual-way conversion type small travel switch provided by the embodiment of the present invention includes a base 1, a shell 2, a contact assembly 3, a compression spring 4, a push handle 5 and a lead wire 7, the shell 2 is arranged on the base 1, the contact assembly 3 is arranged on a boss of the base 1 and fixed inside the shell 2, the lead wire 7 passes through the base 1 and is connected to the contact assembly 3, the push handle 5 enters the inside of the shell 2 from the upper end of the shell 2, and is connected to the contact assembly 3 through the compression spring 4, the switch on-off signal conversion is realized by the setting of the contact assembly 3, and the switch on-off is realized by the connection and disconnection of the contact assembly 3.

[0036] In this embodiment, if Figure 4-Figure 6 As shown, the contact assembly 3 includes a first printed circuit board assembly 8, a second printed circuit board assembly 13, a spring wire A9, a spring wire B10, a spring wire C14, a spring wire D15, a base 12 and a rivet 11. The first printed circuit board assembly 8 and the second printed circuit board assembly 13 are fixed to the left and right sides of the base 12 by the rivet 11. The spring wire A9 and the spring wire B10 are arranged on the first printed circuit board assembly 8, and the spring wire C14 and the spring wire D15 are arranged on the second printed circuit board assembly 13. The contact assembly adopts a combination of circuit structure and mechanical mechanism to solve the problem that the insulation problem of the full mechanical mechanism causes a large space occupation and leads to a large overall volume, and the full circuit structure cannot output input values ​​such as force and displacement through mechanical conversion; the use of filamentary parts as elastic connecting parts avoids the situation that the commonly used sheet parts occupy a large space, are easy to deform, and are easy to fatigue, and further reduces the volume while improving the reliability of the switch life.

[0037] In this embodiment, the first printed circuit board assembly 8 includes a printed circuit board 16, and a group of conductive pillars A17 and conductive pillars B18 are respectively arranged on the left and right sides of the printed circuit board 16, and the conductive pillars B18 are arranged above the conductive pillars A17. They are used to be connected to the common end and the output end of the internal circuit of the printed circuit board 16 to ensure the transmission and conversion of the switch on / off signal.

[0038] In this embodiment, the conductive column A17 and the conductive column B18 are connected to the internal circuit of the printed circuit board 16 by welding. The conductive column B18 is connected to the No. 2 hole of the internal circuit as a common end. The conductive column A17 on the left is connected to the No. 4 hole of the internal circuit as a normally open end. The conductive column A17 on the right is connected to the No. 3 hole of the internal circuit as a normally closed end. The normally open end and the normally closed end are both output points of the internal circuit. The printed circuit board 16 realizes the connection of the common end, the normally open end and the normally closed end through the internal circuit. The internal circuit of the printed circuit board 16 is connected as shown in FIG. Fig. 9As shown, a No. 2 hole is set on both sides as a common terminal, and they are interconnected through internal circuits, and the contact points for connecting with the outside are respectively led out to the lower end of the printed board 16, the No. 4 hole is set as a normally open end, and the contact points for connecting with the outside are led out to the lower end of the printed board 16, and the No. 3 hole is set as a normally closed end, and the contact points for connecting with the outside are also led out to the lower end of the printed board 16. The led-out contact points are used to connect with the lead-out wire 7, and each contact point is connected to the lead-out wire 7 after corresponding Figure 2 and Figure 3 Medium C-10, NO-10, NO-11, NC10, C-11, C-21, NO-20, NO-21, NC-20, C-20.

[0039] in,

[0040] C-10 represents the first common terminal connection point of the first printed circuit board assembly 8;

[0041] C-11 represents the second common terminal connection point of the first printed circuit board assembly 8;

[0042] NO-10 indicates the first connection point of the normally open end of the first printed circuit board assembly 8;

[0043] NO-11 represents the second connection point of the normally open end of the first printed circuit board assembly 8;

[0044] NC10 represents the connection point of the normally closed terminal of the first printed circuit board assembly 8;

[0045] C-20 represents the first common terminal connection point of the second printed board assembly 13;

[0046] C-21 represents the second common terminal connection point of the second printed board assembly 13;

[0047] NO-20 indicates the first connection point of the normally open end of the second printed circuit board assembly 13;

[0048] NO-21 represents the second connection point of the normally open end of the second printed circuit board assembly 13;

[0049] NC-20 represents the connection point of the normally closed terminal of the second printed circuit board assembly 13.

[0050] In this embodiment, a square groove is formed in the middle of the upper end of the printed circuit board 16, and the compression spring 4 is arranged in the square groove. This structural design reduces the volume of the overall structure and realizes the triggering function of the triggering mechanism composed of the compression spring 4 and all the spring wires. Figure 7 shown.

[0051] In this embodiment, an arch-shaped groove is provided from the lower edge of the printed circuit board 16 to the contact point leading out of the common terminal, the contact point leading out of the normally open terminal, and the contact point leading out of the normally closed terminal. The design of the arch-shaped groove makes the connection between the lead wire 7 and the printed circuit board 16 tighter and reduces the space occupied by the connection. Figure 7 shown.

[0052] In this embodiment, one end of the spring wire A9 is fixed to the upper left of the printed circuit board 16, and the other end is S-shaped to bypass the conductive pillars A17 and B18 on the left side of the printed circuit board 16. One end of the spring wire B10 is fixed to the upper right of the printed circuit board 16, and the other end is reverse S-shaped to bypass the conductive pillars A17 and B18 on the right side of the printed circuit board 16, thereby playing a supporting and redundant conduction role.

[0053] In this embodiment, the first printed circuit board assembly 8 and the second printed circuit board assembly 13 are symmetrical components, the spring wire C14 corresponds to the spring wire B10, and the spring wire D15 corresponds to the spring wire A9. A symmetrical structure is adopted, and the dual-path switching requirement can be achieved through one trigger mechanism without adding other components. The volume increase problem caused by the circular arrangement of spring plates requiring multi-layer distribution to achieve switching is avoided, and the switch shape is compressed to the maximum extent. The overall volume of the switch is reduced while ensuring the dual-path switching and large stroke requirements.

[0054] In this embodiment, the base 1 and the housing 2 are connected as a whole through laser sealing and welding to protect the wires and the internal contact components 3.

[0055] In this embodiment, the lead wire 7 is connected to the common terminal, the normally open terminal and the normally closed terminal of the contact assembly 3. The connection between the circuit structure and the mechanical mechanism of the contact assembly 3 is achieved through the design of this structure.

[0056] During operation, when the push handle 5 receives an external force, it moves vertically downward under the guidance of the housing 2, compressing the compression spring 4 to store elastic potential energy; when the push handle 5 contacts the spring wires A9, B10, C14 and D15 of the contact assembly 3, the spring wires A9, B10, C14 and D15 are squeezed by the push handle 5 and elastically deformed, so that the spring wires B10 and C14 are disconnected from the normally closed end, and the spring wires A9 and D15 are in contact with the normally open end; When the external force disappears, the compression spring 4 releases its elastic potential energy and pushes the handle 5 to move upward. When the handle 5 is no longer in contact with the spring wires A9, B10, C14 and D15 of the contact assembly 3, the spring wires A9, B10, C14 and D15 return to a free state under the action of their own elastic force, that is, the normally open end is disconnected from the spring wires A9 and D15, and the normally closed end is connected to the spring wires B10 and C14, and the switch completes one action cycle.

[0057] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A two-way conversion type small travel switch, characterized in that: The invention comprises a base (1), a shell (2), a contact assembly (3), a compression spring (4), a push handle (5) and a lead wire (7); the shell (2) is arranged on the base (1); the contact assembly (3) is arranged on a boss of the base (1) and fixed inside the shell (2); the lead wire (7) passes through the base (1) and is connected to the contact assembly (3); the push handle (5) enters the inside of the shell (2) from the upper end of the shell (2) and is connected to the contact assembly (3) through the compression spring (4).

2. The dual-circuit conversion type small travel switch according to claim 1, characterized in that: The contact assembly (3) comprises a first printed circuit board assembly (8), a second printed circuit board assembly (13), a spring wire A (9), a spring wire B (10), a spring wire C (14), a spring wire D (15), a base (12) and a rivet (11); the first printed circuit board assembly (8) and the second printed circuit board assembly (13) are fixed to the left and right sides of the base (12) by the rivet (11); the spring wire A (9) and the spring wire B (10) are arranged on the first printed circuit board assembly (8); and the spring wire C (14) and the spring wire D (15) are arranged on the second printed circuit board assembly (13).

3. The dual-circuit conversion type small travel switch according to claim 2, characterized in that: The first printed circuit board assembly (8) comprises a printed circuit board (16), a group of conductive pillars A (17) and conductive pillars B (18) are arranged on the left and right sides of the printed circuit board (16), and the conductive pillars B (18) are arranged above the conductive pillars A (17).

4. The dual-circuit conversion type small travel switch according to claim 3, characterized in that: The conductive column A (17) and the conductive column B (18) are connected to the internal circuit of the printed circuit board (16) by welding, the conductive column B (18) is connected to the No. 2 hole of the internal circuit as a common end, the left conductive column A (17) is connected to the No. 4 hole of the internal circuit as a normally open end, and the right conductive column A (17) is connected to the No. 3 hole of the internal circuit as a normally closed end.

5. The dual-circuit conversion type small travel switch according to claim 4, characterized in that: A square groove is provided in the middle of the upper end of the printed circuit board (16), and the compression spring (4) is arranged in the square groove.

6. The dual-circuit conversion type small travel switch according to claim 4, characterized in that: Arch-shaped grooves are respectively provided from the lower edge of the printed board (16) to the contact point leading out of the common end, the contact point leading out of the normally open end, and the contact point leading out of the normally closed end.

7. The dual-circuit conversion type small travel switch according to claim 2, characterized in that: One end of the spring wire A (9) is fixed to the upper left of the printed board (16), and the other end is wound around the conductive column A (17) and the conductive column B (18) on the left side of the printed board (16) in an S shape. One end of the spring wire B (10) is fixed to the upper right of the printed board (16), and the other end is wound around the conductive column A (17) and the conductive column B (18) on the right side of the printed board (16) in an inverted S shape.

8. The dual-circuit conversion type small travel switch according to claim 2, characterized in that: The first printed circuit board assembly (8) and the second printed circuit board assembly (13) are symmetrical assemblies, the spring wire C (14) corresponds to the spring wire B (10), and the spring wire D (15) corresponds to the spring wire A (9).

9. The dual-circuit conversion type small travel switch according to claim 1, characterized in that: The base (1) and the housing (2) are connected as one body through laser sealing welding.

10. The dual-circuit conversion type small travel switch according to claim 1, characterized in that: The lead wire (7) is connected to the common end, the normally open end and the normally closed end of the contact component (3).

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