Tension spring microswitch with large contact distance
By exchanging the positions of the normally open terminal and the normally closed terminal in the micro switch, and using the bending part to increase the distance between the inner terminals, the problem of insufficient contact distance of the micro switch in a harsh environment with high current is solved, and a larger The adaptability of contact distance makes it suitable for environments such as power tools.
Patent Information
- Application Number
- CN202420923657.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-04-30
AI Technical Summary
When used in high current and harsh environments, the distance between the normally open terminal and the normally closed terminal is too small to meet the needs, and there is a challenge to expand the contact distance while maintaining the original appearance size. .
A tension spring type micro switch is designed. By exchanging the positions of the normally open terminal and the normally closed terminal, and setting a downwardly extending bending portion at the inner end of the normally closed terminal, the number of normally open terminals and normally closed terminals is increased. The distance between the inner ends achieves the effect of a large contact distance.
It achieves the requirement of a larger contact distance without changing the external dimensions of the traditional switch. It is especially suitable for use in high current and harsh environments such as power tools.
Smart Images
Figure CN222354971U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of micro switches, in particular to a tension spring type micro switch with a large contact distance. Background Art
[0002] The micro switch is a commonly used switch component at present. In the existing micro switch, the upper and lower positions of the normally open terminal and the normally closed terminal and the distance between the normally open terminal and the normally closed terminal are fixed. However, the distance between the normally open terminal and the normally closed terminal is relatively small, which cannot meet the needs of using in harsh environments such as power tools with high current and serious sparks. If the needs of high current are to be met, the shape of the micro switch needs to be enlarged, which is not suitable for use in the original machine. Utility Model Content
[0003] The utility model provides a tension spring type micro switch with a large contact distance, which can solve the problem that the distance between the normally open terminal and the normally closed terminal of the existing micro switch is relatively small and cannot meet the harsh environment of large current and serious sparking.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a tension spring type micro switch with a large contact distance, comprising a shell, wherein the first end of the shell is provided with a normally open terminal and a normally closed terminal extending side by side, wherein the normally open terminal is located above the normally closed terminal, and the inner end of the normally closed terminal is provided with a bending portion extending downward, and the bending portion is provided close to the inner bottom surface of the shell; a COM terminal is extended and arranged on the lower side of the shell, and the upper end of the COM terminal is vertically inserted into the inner top surface of the shell for clamping; a button is arranged on the upper side of the second end of the shell; a linkage bracket, Installed inside the shell, the linkage bracket includes a positioning plate located on the upper side and a moving contact piece located on the lower side, the first end of the positioning plate is provided with a clamping portion clamped with the upper end of the COM terminal, the second end of the positioning plate is connected to the first end of the moving contact piece through an arc-shaped connecting portion, the second end of the moving contact piece extends between the normally open terminal and the normally closed terminal, and the second end of the moving contact piece is provided with a moving contact point that cooperates with the normally open terminal and the normally closed terminal; a tension spring, the first end of the tension spring is connected to the inside of the second end of the shell, and the second end of the tension spring extends to the middle of the moving contact piece and is connected.
[0005] Preferably, the distance A between the inner ends of the normally open terminal and the normally closed terminal is not less than 3 mm.
[0006] Preferably, the second end of the positioning plate is provided with an extension portion, and the extension portion extends to the lower end of the button.
[0007] Preferably, a dust cover is mounted on the upper side of the second end of the shell and is sleeved on the outside of the button.
[0008] Preferably, a positioning column is provided inside the second end of the shell near the arc-shaped connecting portion, and the first end of the tension spring is connected to the positioning column.
[0009] Compared with the prior art, the beneficial effects of the utility model are:
[0010] The positions of the normally open terminal and the normally closed terminal are interchanged, and the distance between the inner ends of the normally open terminal and the normally closed terminal can be made relatively large, so that the contact between the moving and fixed contacts is always in a good state. The contact spacing of more than 3mm can meet the use in harsh environments such as power tools with high current and severe sparks. Therefore, it can meet the requirements of larger contact distance without changing the external dimensions of the traditional switch. It is particularly suitable for use in the whole machine environment with larger contact distance requirements. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 This is a main cross-sectional structural diagram of the utility model;
[0012] Figure 2 It is a structural diagram of the linkage bracket of the utility model. DETAILED DESCRIPTION
[0013] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0014] like Figure 1-2As shown, the utility model provides a spring-type micro switch with a large contact distance, including a shell 1, wherein the first end of the shell 1 is provided with a normally open terminal 4 and a normally closed terminal 3 extending side by side, wherein the normally open terminal 4 is located above the normally closed terminal 3, and the inner side end of the normally closed terminal 3 is provided with a downwardly extending bending portion 31, and the bending portion 31 is arranged close to the inner bottom surface of the shell 1; a COM terminal 2 is extended and arranged on the lower side of the shell 1, and the upper end of the COM terminal 2 is vertically inserted into the inner top surface of the shell 1 for clamping; a button 10 is arranged on the upper side of the second end of the shell 1; a linkage bracket 8 is installed inside the shell 1, and the The linkage bracket 8 includes a positioning plate 81 located on the upper side and a moving contact piece 85 located on the lower side, the first end of the positioning plate 81 is provided with a clamping portion 82 clamped with the upper end of the COM terminal 2, the second end of the positioning plate 81 is connected to the first end of the moving contact piece 85 through an arc-shaped connecting portion 84, the second end of the moving contact piece 85 extends to between the normally open terminal 4 and the normally closed terminal 3, the second end of the moving contact piece 85 is provided with a moving contact 6 that cooperates with the normally open terminal 4 and the normally closed terminal 3; a tension spring 5, the first end of the tension spring 5 is connected to the inside of the second end of the shell 1, and the second end of the tension spring 5 extends to the middle of the moving contact piece 85 and is connected.
[0015] The bent portion 31 can enlarge the distance between the inner ends of the normally open terminal 4 and the normally closed terminal 3 , meeting the use requirements in harsh environments such as power tools with high current and severe sparks.
[0016] Specifically, the housing 1 is made of PBT engineering plastic injection molding, which has stable performance and good electrical performance. It is the shell of the entire switch and plays a role in protecting hardware components. A split structure can be adopted. The COM terminal 2 is stamped from brass and is used during welding. This terminal is the common terminal of the switch. When in use, other terminals must be connected to it for the switch to work normally, which plays the role of powering on or off.
[0017] The normally closed terminal 3 is stamped from brass and can be used for external welding. When the button 10 is in a free state and connects the normally closed terminal 3 and the COM terminal 2, the switch is in an energized state. When the button 10 is pressed, the normally closed terminal 3 is in an off-state. It is realized together with the fixed contacts thereon in the same mold. The fixed contacts are generally composed of AgN i / Copper composite materials when AC power is applied, which can ensure that the switch has low resistance and a long electrical life.
[0018] The normally open terminal 4 is stamped from brass and can be used for external welding. When the button 10 is in a free state and connects the normally open terminal 4 and the COM terminal 2, the switch is in an off state. When the button 10 is pressed, the normally open terminal 4 is in an energized state and is realized together with the fixed contact in the same mold. The fixed contact is generally composed of AgN i / Copper composite material when AC power is applied, which can ensure that the switch has low resistance and a long electrical life.
[0019] The tension spring 5 serves as the return force of the button 10 and is made of stainless steel to ensure its return force.
[0020] The linkage bracket 8 is a support for the charged body and is stamped from stainless steel. When the button 10 is switched, force is directly applied to the linkage bracket 8, which drives the moving contact piece 85 and the action mechanism of the tension spring 5 to move, thereby ensuring good switch function.
[0021] In this embodiment, if Figure 1 As shown, the distance A between the inner ends of the normally open terminal 4 and the normally closed terminal 3 is not less than 3 mm, which can meet the requirements of use in harsh environments such as power tools with high current and severe sparks.
[0022] In order to better cooperate with the button 10, the second end of the positioning plate 81 is provided with an extension portion 83, and the extension portion 83 extends to the lower end of the button 10. At the same time, a dust cover 11 is installed on the upper side of the second end of the housing 1 and is sleeved on the outside of the button 10. A positioning column 12 is provided inside the second end of the housing 1 near the arc-shaped connecting portion 84, and the first end of the tension spring 5 is connected to the positioning column 12 to facilitate the installation of the tension spring 5.
[0023] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0024] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0025] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0026] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
Claims
1. A spring-type micro switch with a large contact distance, characterized in that: include: A housing (1), wherein a first end of the housing (1) is provided with a normally open terminal (4) and a normally closed terminal (3) extending side by side, wherein the normally open terminal (4) is located above the normally closed terminal (3), and an inner end of the normally closed terminal (3) is provided with a bent portion (31) extending downward, and the bent portion (31) is arranged in close contact with the inner bottom surface of the housing (1); A COM terminal (2) is extended out from the lower side of the housing (1), and the upper end of the COM terminal (2) is vertically inserted into the inner top surface of the housing (1) for clamping; A button (10) is arranged on the upper side of the second end of the housing (1); A linkage bracket (8) is installed inside the housing (1), the linkage bracket (8) comprising a positioning plate (81) located on the upper side and a moving contact piece (85) located on the lower side, the first end of the positioning plate (81) is provided with a clamping portion (82) clamped with the upper end of the COM terminal (2), the second end of the positioning plate (81) is connected to the first end of the moving contact piece (85) through an arc-shaped connecting portion (84), the second end of the moving contact piece (85) extends between the normally open terminal (4) and the normally closed terminal (3), and the second end of the moving contact piece (85) is provided with a moving contact point (6) matched with the normally open terminal (4) and the normally closed terminal (3); A tension spring (5), wherein the first end of the tension spring (5) is connected to the inside of the second end of the housing (1), and the second end of the tension spring (5) extends to and is connected to the middle of the moving contact piece (85).
2. The spring-type micro switch with a large contact distance according to claim 1, characterized in that: The distance A between the inner ends of the normally open terminal (4) and the normally closed terminal (3) is not less than 3 mm.
3. The spring-type micro switch with a large contact distance according to claim 1, characterized in that: The second end of the positioning plate (81) is provided with an extension portion (83), and the extension portion (83) extends to the lower end of the button (10).
4. The spring-type micro switch with a large contact distance according to claim 1, characterized in that: A dust cover (11) is mounted on the upper side of the second end of the housing (1) and is sleeved on the outside of the button (10).
5. The spring-type micro switch with a large contact distance according to claim 1, characterized in that: A positioning column (12) is provided inside the second end of the housing (1) near the arc-shaped connecting portion (84), and the first end of the tension spring (5) is connected to the positioning column (12).