Micro-motion miniature switch

Abstract

The utility model relates to the technical field of switches, and especially relates to a micro-motion miniature switch comprising a housing; a button; the transmission rod is located in the shell and fixedly connected with the button, and the button is suitable for driving the transmission rod to move; the spring is located in the shell and connected with the transmission rod; the at least two reeds are strip-shaped and are distributed at intervals along the length direction of the transmission rod; the elastic pieces are arched and symmetrically arranged on the two sides of the transmission rod, one ends of the elastic pieces abut against the side face of the transmission rod, and the other ends of the elastic pieces are connected with one ends of the reeds in the length direction; and the movable contacts are arranged on the upper and lower side surfaces of the two ends of the reed in the length direction. According to the utility model, the plurality of reeds are integrated in the microswitch, the button presses the transmission rod to drive the plurality of reeds to synchronously deform so as to change the position of the movable contact, the reeds and the transmission rod form an instantaneous reversing mechanism, and the reeds are simple in structure, easy to process and assemble and stable and reliable in deformation effect, so that the reliability of the microswitch is improved. Therefore, accurate synchronous conversion of multiple circuits can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of switches, in particular to a micro-motion miniaturized switch. Background Art

[0002] Micro switches are also called sensitive switches. They are very fast in closing or opening, and are often used to switch the circuit on and off in automatic control circuits. A micro switch can generally only control one circuit. If multiple circuits are to be switched, multiple micro switches are usually combined and used together; for example, a double-unit combined micro switch is composed of two micro switches and is a linkage micro switch used to switch two circuits on and off.

[0003] In practical applications, in order to achieve simultaneous switching of multiple circuits, multiple micro switches are often connected end to end and used in conjunction; however, due to certain processing and assembly errors in the instantaneous reversing mechanisms of each micro switch, the micro switches cannot accurately switch synchronously. When used for signal control, the controlled signals cannot be connected or disconnected at the same time, resulting in signal disorder; if used for the control of multiple circuits, it will cause the controlled electrical appliances to be instantly phase-lost or short-circuited. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a miniaturized micro switch to solve the technical problem that the instantaneous reversing mechanisms of the micro switches in the prior art have certain processing and assembly errors, resulting in the inability of the micro switches to accurately and synchronously switch.

[0005] The utility model provides a micro-miniaturized switch, comprising:

[0006] case;

[0007] A button, one end of which is located inside the housing and the other end of which protrudes outside the housing;

[0008] A transmission rod, located in the housing and fixedly connected to the button, wherein the button is suitable for driving the transmission rod to move;

[0009] a spring, located in the housing and connected to the transmission rod, the spring being adapted to reversely drive the transmission rod after the button releases the transmission rod;

[0010] At least two reeds are in the shape of long strips and are spaced apart along the length direction of the transmission rod. The transmission rod passes through the reeds at the center of the length direction of the reeds. The structure of the reeds is symmetrical about the transmission rod.

[0011] The spring sheet is arched and symmetrically arranged on both sides of the transmission rod, one end of the spring sheet abuts against the side of the transmission rod, and the other end is connected to one end of the spring sheet in the length direction, and the end of the spring sheet connected to the transmission rod is suitable for being pressed downward by the transmission rod when the button drives the transmission rod to move, and the end of the spring sheet connected to the spring sheet is suitable for being pulled upward by the spring sheet when the button drives the transmission rod to move;

[0012] The moving contact is arranged on the upper and lower side surfaces at both ends of the spring in the length direction;

[0013] A wiring piece is arranged on the upper and lower sides of both ends of the spring piece in the length direction, one end of the wiring piece is located inside the shell, and the other end is located outside the shell, and a static contact is provided on the wiring piece facing the moving contact, and the moving contact and the static contact are suitable for contacting each other when the button does not drive the transmission rod to move or the spring piece is pulled upward by the spring piece.

[0014] Optionally, a strip hole is provided on the spring sheet, the length of the strip hole extends along the length direction of the spring sheet, and the end of the spring sheet in the length direction of the strip hole is connected to the spring sheet as a whole; the transmission rod passes through the strip hole.

[0015] Optionally, a slot is provided on a side surface of the transmission rod, and an end of the spring sheet abuts against the slot.

[0016] Optionally, the arching direction of the spring is opposite to the direction in which the button drives the transmission rod to move.

[0017] Optionally, when the button does not drive the transmission rod to move, the initial shape of the reed is an arc, and the middle section of the reed is higher than the two ends of the reed in the length direction, and the moving contacts located on the lower sides of the two ends of the reed are in contact with the static contacts below.

[0018] Optionally, the transmission rod includes a shaft portion and a limiting portion, the number of the limiting portions is the same as the number of the reeds, a shaft portion is provided on the lower surface of each limiting portion, and an isolation block and a limiting hole for the shaft portion to pass through are arranged between adjacent reeds in the shell, the isolation block is used to block the limiting portion from moving downward to the limit position, and is used to block the limiting portion from moving upward to the limit position.

[0019] Optionally, the side wall of the shaft portion is slidably matched with the inner wall of the limiting hole; and the lower surface of the isolation block is provided with an avoidance groove for avoiding the elastic sheet.

[0020] Optionally, a positioning groove is provided at the bottom of the shell, the spring is arranged in the positioning groove, the shaft portion at the bottom end of the transmission rod is inserted into the spring, and the top end of the spring is against the lower surface of the limiting portion.

[0021] Optionally, a groove is provided on the outer wall of the shell, a rotating shaft is provided in the groove, a pressure rod is fixed on the rotating shaft, and the pressure rod presses on the button.

[0022] Optionally, a plurality of the shells are arranged in series and side by side, and a series mounting hole is provided on the shells.

[0023] The technical solution of the utility model has the following advantages:

[0024] 1. Multiple reeds are integrated in a micro switch. The button is pressed to drive the transmission rod to synchronously deform the multiple reeds to change the position of the moving contact. The reed and the transmission rod constitute an instantaneous reversing mechanism. Since the reed has a simple structure, is easy to process and assemble, and has a stable and reliable deformation effect, it can achieve accurate synchronous conversion of multiple circuits;

[0025] 2. A strip hole is set on the spring leaf for the transmission rod to pass through, an avoidance groove is set on the surface of the isolation block to avoid the spring leaf, and a groove with a built-in rotating shaft is set on the outer wall of the shell. These designs are conducive to making the micro switch smaller; 3. Multiple shells are arranged side by side in series to realize the linkage of multiple micro switches. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 is a three-dimensional diagram of the micro-miniaturized switch in Example 1;

[0028] Figure 2 This is a front view of the miniaturized micro switch in Example 1 behind a hidden panel;

[0029] Figure 3 Schematic diagram of the structure of the instantaneous reversing mechanism in Example 1;

[0030] Figure 4 It is a three-dimensional diagram of the double-link micro-miniaturized switch in Example 2.

[0031] Description of reference numerals:

[0032] 1. Shell; 1a. Base plate; 1b. Panel; 10. Arc surface; 11. Isolation block; 111. Limit hole; 112. Pit; 113. Avoidance groove; 12. Chamber; 13. Positioning groove; 14. Recess; 2. Button; 3. Transmission rod; 31. Shaft; 32. Limit part; 321. Slot; 4. Spring; 41. Strip hole; 5. Spring piece; 6. Moving contact; 7. Terminal piece; 8. Static contact; 9. Spring; 15. Pressure rod; 16. Bearing; 17. Rotating shaft; 18. Series mounting hole. DETAILED DESCRIPTION

[0033] The following will describe in detail a specific embodiment of the utility model in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the description of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] Unless otherwise clearly specified and limited, the terms "disposed", "installed", "connected" and the like should be understood in a broad sense, for example, it 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. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0035] The directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the utility model.

[0036] The terms "first", "second", "third" and the like are merely used to distinguish elements of similar nature, and do not indicate or imply relative importance or a particular order.

[0037] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0038] Example 1

[0039] Reference Figure 1 The utility model provides a micro-miniaturized switch, comprising a housing 1, wherein the housing 1 is composed of a substrate 1a and a panel 1b, and the panel 1b and the substrate 1a are positioned during assembly by plugging and matching holes and pins.

[0040] Reference Figure 1 and Figure 2 The outer wall of the housing 1 is connected to a pressure rod 15 through a rotating shaft 17. A bearing 16 is provided at the end of the pressure rod 15. The lower surface of the pressure rod 15 between the bearing 16 and the rotating shaft 17 presses the button 2. A hole is opened on the base plate 1a of the housing 1 to the inside of the housing 1. The button 2 is accommodated in the hole. The top of the button 2 protrudes out of the housing 1 and contacts the pressure rod 15. The bottom of the button 2 goes deep into the housing 1 to connect with the instantaneous reversing mechanism. When the bearing 16 is subjected to external pressure, the pressure rod 15 becomes a lever rotating around the rotating shaft 17, thereby pressing the button 2 downward, so that the button 2 triggers the instantaneous reversing mechanism in the housing 1.

[0041] Reference Figure 2 A groove 14 is provided on the outer wall of the shell 1, a rotating shaft 17 is placed in the groove 14, and one end of the pressure rod 15 is fixed on the rotating shaft 17; the design of the groove 14 can make the height of the pressure rod 15 protruding from the shell 1 smaller, which is conducive to the miniaturization of the micro switch. The top of the button 2 is designed to be an arc surface, and the button 2 contacts the plane of the lower surface of the pressure rod 15 through the arc surface, which can reduce the contact resistance. The hole for accommodating the button 2 is provided on the shell 1, and the opposite side walls of the hole wall are planes that fit the side of the button 2, and the other two side walls are arc surfaces 10 protruding toward the side of the button 2, and the arc surface 10 contacts the side of the button 2; this design can reduce the resistance of the hole wall to the up and down movement of the button 2 under the premise of limiting the hole wall to the button 2.

[0042] Reference Figure 2 and Figure 3 The instantaneous reversing mechanism in the housing 1 includes a transmission rod 3 and a spring leaf 4, wherein the top end of the transmission rod 3 is fixedly connected to the bottom end of the button 2, and the transmission rod 3 and the button 2 can also be designed as an integral structure. After the pressure rod 15 presses the button 2, the button 2 can drive the transmission rod 3 to move downward. The spring leaf 4 is a straight spring leaf in the shape of a long strip. A strip hole 41 and a spring leaf 5 are punched out in the center of the spring leaf 4. The length of the strip hole 41 extends along the length direction of the spring leaf 4. The spring leaf 5 is connected to the spring leaf 4 at the end of the strip hole 41 in the length direction. Since the end of the strip hole 41 is close to the end of the spring leaf 4, it is equivalent to one end of the spring leaf 5 connecting one end of the spring leaf 4 in the length direction. The transmission rod 3 passes through the strip hole 41 and is located in the middle position of the strip hole 41 in the length direction. The structure of the spring leaf 4 is symmetrical about the transmission rod 3. The spring leaf 5 is arched and symmetrically arranged on both sides of the transmission rod 3. Two opposite side surfaces of the transmission rod 3 are provided with slots 321 , and the ends of the spring piece 5 abut against the slots 321 .

[0043] Reference Figure 2, the arching direction of the spring sheet 5 is opposite to the direction in which the button 2 drives the transmission rod 3 to move. For example, in this embodiment, the direction in which the button 2 drives the transmission rod 3 to move is downward, and the spring sheet 5 arches upward. Since one end of the spring sheet 5 is clamped in the slot 321 and has elastic potential energy after bending, the other end of the spring sheet 5 will act on the end of the spring sheet 4, so that the spring sheet 4 is bent into an arc shape. This is the initial shape of the spring sheet 4 when the button 2 does not drive the transmission rod 3 to move after the spring sheet 4 is installed in the housing 1. The middle section of the spring sheet 4 in the initial shape is higher than the two ends of the length direction of the spring sheet 4, that is, the center of the spring sheet 4 arches upward; the arching direction of the spring sheet 4 is the same as that of the spring sheet 5, and in this embodiment, both are arched upward.

[0044] Reference Figure 2 , several independent chambers 12 are arranged in the housing 1, the number of the chambers 12 corresponds to the number of the springs 4, and each chamber 12 accommodates one spring 4. Adjacent chambers 12 are separated by an isolation block 11 in the housing 1, and a limiting hole 111 is arranged at the center of the isolation block 11 for the transmission rod 3 to pass through. Four wiring pieces 7 are arranged in each chamber 12, and the wiring pieces 7 are divided into an upper wiring piece and a lower wiring piece. The four wiring pieces 7 are divided into two groups, and each group includes an upper wiring piece and a lower wiring piece; an upper wiring piece is arranged opposite to the upper side of the two ends of the spring 4 in the length direction, and a lower wiring piece is arranged opposite to the lower side; one end of the wiring piece 7 is located in the chamber 12, and the other end passes through the outside of the housing 1. Moving contacts 6 are fixed on the upper and lower side surfaces at both ends of the spring 4 in the length direction, and a static contact 8 facing the moving contact 6 is arranged on the wiring piece 7.

[0045] Reference Figure 2 When the spring leaf 4 is in the initial shape, the moving contact 6 contacts the static contact 8 on the lower wiring sheet, and the circuit is in one state; when the button 2 is pressed downward, the button 2 drives the transmission rod 3 to move downward, and the transmission rod 3 presses one end of the spring leaf 5 downward through the slot 321 to deform the spring leaf 5, so that the other end of the spring leaf 5 pulls the end of the spring leaf 4 upward until the moving contact 6 at the end of the spring leaf 4 contacts the upper contact sheet, and the circuit is switched to another state.

[0046] Reference Figure 2 In this embodiment, two chambers 12 are designed in the housing 1, and the transmission rod 3 connects two reeds 4; the number of chambers 12 and reeds 4 is not limited to two, but is at least two.

[0047] Reference Figure 2 and Figure 3The transmission rod 3 is integrally formed by at least two shaft portions 31 and at least two limiting portions 32. The limiting portions 32 are in the shape of a rectangular parallelepiped, the shaft portions 31 are in the shape of a cylinder, and all the shaft portions 31 are coaxially arranged. The number of shaft portions 31 and limiting portions 32 is the same as the number of spring leaves 4, and a shaft portion 31 is provided on the lower surface of each limiting portion 32. When the button 2 drives the transmission rod 3 to move, the transmission rod 3 moves along the axial direction of the shaft portion 31. The shaft portion 31 passes through the above-mentioned limiting hole 111, and the inner wall of the limiting hole 111 slides with the side wall of the shaft portion 31. The limiting portion 32 passes through the strip hole 41 of the above-mentioned spring leaf 4, and the opposite side walls of the limiting portion 32 slide with the inner walls of the two sides of the width direction of the strip hole 41, which plays a role in limiting the movement of the limiting portion 32.

[0048] Reference Figure 2 , the upper and lower surfaces of the isolation block 11 are respectively used to block the two limiting parts 32 to prevent the transmission rod 3 from moving excessively; the upper surface of the isolation block 11 is used to block the limiting part 32 moving downward to the limit position, and the lower surface of the isolation block 11 is used to block the limiting part 32 moving upward to the limit position. In order to extend the moving distance of the transmission rod 3, pits 112 are also provided on the upper and lower surfaces of the isolation block 11 to accommodate the limiting part 32 at the limit position; this design allows the limiting part 32 to move a greater distance within the limited space of the chamber 12, and even if the micro switch is made very small, it can ensure that the button 2 has sufficient displacement. Since the spring sheet 5 is arched upward, in order to avoid the highest point of the spring sheet 5 from interfering with the lower surface of the isolation block 11, an avoidance groove 113 for avoiding the spring sheet 5 can also be provided on the lower surface of the isolation block 11; this design ensures that the spring sheet 5 will not contact the isolation block 11 even if the micro switch is made very small.

[0049] Reference Figure 2 A positioning groove 13 is provided at the bottom of the lowest chamber 12, and a spring 9 is positioned in the positioning groove 13. The spring 9 is coaxially arranged with the transmission rod 3. The shaft portion 31 at the bottom end of the transmission rod 3 is cooperatively inserted into the spring 9. The top end of the spring 9 abuts against the lower surface of the lowest limiting portion 32. The spring 9 is used to rebound the transmission rod 3 when the button 2 releases the transmission rod 3.

[0050] In summary, the working principle of the micro-miniaturized switch provided in this embodiment is as follows:

[0051] Reference Figure 2 When the button 2 does not drive the transmission rod 3 to move, the spring 4 is in the initial shape, the end of the spring 5 abutting against the transmission rod 3 is higher than the end of the spring 5 connected to the spring 4, the spring 5 has elastic potential energy under the squeezing action of the slot 321 of the transmission rod 3, the spring 4 is slightly arched under the elastic force of the spring 5, the spring 5 presses the two ends of the spring 4 to a lower position, the moving contacts 6 at the two ends of the spring 4 are in contact with the static contacts 8 below, and the spring 5 presses the moving contacts 6 at the two ends of the spring 4 tightly against the static contacts 8 below;

[0052] When the bearing 16 on the pressure rod 15 is acted by an external force, the pressure rod 15 rotates around the rotating shaft 17 and presses the button 2, and the button 2 drives the transmission rod 3 to move downward, and the transmission rod 3 presses down one end of the spring sheet 5 on both sides, and the spring sheet 5 is slightly squeezed and deformed under pressure, while the other end pulls the end of the spring sheet 4 upward, so that the moving contact 6 at the end of the spring sheet 4 is pressed tightly on the static contact 8 above;

[0053] After the external force acting on the pressure rod 15 disappears, the button 2 releases the transmission rod 3, and the spring 9 rebounds the transmission rod 3, causing the transmission rod 3 to move upward until the reed 4 returns to its initial shape.

[0054] Example 2

[0055] Reference Figure 4 The utility model provides a double micro-miniaturized switch based on Example 1, which adopts a method of connecting multiple micro-miniaturized switches in series so that external force acts on the pressure rods 15 of the two micro-miniaturized switches at the same time, thereby making the two micro-miniaturized switches act synchronously.

[0056] A serial mounting hole 18 is provided on the housing 1 of the micro miniaturized switch. The serial mounting hole 18 penetrates the isolation block 11 in the housing 1, and the serial mounting holes 18 of all micro miniaturized switches are at the same position. Two micro miniaturized switches can be installed in series by inserting bolts or other rod-shaped objects into the serial mounting holes 18.

[0057] As another implementation method, more than two micro-miniaturized switches can be connected in series for more complex usage scenarios.

[0058] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A micro-miniaturized switch, characterized in that: include: case; A button, one end of which is located inside the housing and the other end of which protrudes outside the housing; A transmission rod, located in the housing and fixedly connected to the button, wherein the button is suitable for driving the transmission rod to move; a spring, located in the housing and connected to the transmission rod, the spring being adapted to reversely drive the transmission rod after the button releases the transmission rod; At least two reeds are in the shape of long strips and are spaced apart along the length direction of the transmission rod. The transmission rod passes through the reeds at the center of the length direction of the reeds. The structure of the reeds is symmetrical about the transmission rod. The spring sheet is arched and symmetrically arranged on both sides of the transmission rod, one end of the spring sheet abuts against the side of the transmission rod, and the other end is connected to one end of the spring sheet in the length direction, and the end of the spring sheet connected to the transmission rod is suitable for being pressed downward by the transmission rod when the button drives the transmission rod to move, and the end of the spring sheet connected to the spring sheet is suitable for being pulled upward by the spring sheet when the button drives the transmission rod to move; The moving contact is arranged on the upper and lower side surfaces at both ends of the spring in the length direction; A wiring piece is arranged on the upper and lower sides of both ends of the spring piece in the length direction, one end of the wiring piece is located inside the shell, and the other end is located outside the shell, and a static contact is provided on the wiring piece facing the moving contact, and the moving contact and the static contact are suitable for contacting each other when the button does not drive the transmission rod to move or the spring piece is pulled upward by the spring piece.

2. The micro-miniaturized switch according to claim 1, characterized in that: The reed and the spring are integrally formed, a strip hole is provided on the reed, the length of the strip hole extends along the length direction of the reed, and the end of the spring in the length direction of the strip hole is connected to the reed as a whole; the transmission rod passes through the strip hole.

3. The micro-miniaturized switch according to claim 1, characterized in that: A slot is provided on the side of the transmission rod, and the end of the spring sheet abuts against the slot.

4. The micro-miniaturized switch according to claim 1, characterized in that: The arching direction of the spring sheet is opposite to the direction in which the button drives the transmission rod to move.

5. The micro-miniaturized switch according to claim 1, characterized in that: When the button does not drive the transmission rod to move, the initial shape of the reed is an arc, and the middle section of the reed is higher than the two ends of the reed in the length direction, and the moving contacts located on the lower side surfaces of the two ends of the reed are in contact with the static contacts below.

6. The micro-miniaturized switch according to claim 1, characterized in that: The transmission rod includes a shaft portion and a limiting portion, the number of the limiting portions is the same as the number of the spring leaves, a shaft portion is provided on the lower surface of each limiting portion, and an isolation block and a limiting hole for the shaft portion to pass through are arranged between adjacent spring leaves in the shell, the isolation block is used to block the limiting portion from moving downward to the limit position, and is used to block the limiting portion from moving upward to the limit position.

7. The micro-miniaturized switch according to claim 6, characterized in that: The side wall of the shaft portion is slidably matched with the inner wall of the limiting hole; and the lower surface of the isolation block is provided with an avoidance groove for avoiding the elastic sheet.

8. The micro-miniaturized switch according to claim 6, characterized in that: A positioning groove is provided at the bottom of the housing, the spring is arranged in the positioning groove, the shaft portion at the bottom end of the transmission rod is inserted into the spring, and the top end of the spring abuts against the lower surface of the limiting portion.

9. The micro-miniaturized switch according to claim 1, characterized in that: A groove is arranged on the outer wall of the shell, a rotating shaft is arranged in the groove, a pressure rod is fixed on the rotating shaft, and the pressure rod is pressed on the button.

10. The micro-miniaturized switch according to any one of claims 1 to 9, characterized in that: A plurality of the shells are arranged in parallel and in series, and a series mounting hole is provided on the shells.

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