A novel micro switch structure

Abstract

This utility model relates to the field of micro switches. It discloses a novel micro switch structure, comprising: a housing, a drive button, an elastic element, a stationary contact, a moving contact, and a drive block. A groove is formed on the side wall of the housing. The drive button has a protrusion that slides within the groove. The protrusion and the elastic element are arranged sequentially along the sliding direction of the drive button. The stationary contact includes a normally open contact and a normally closed contact. The moving contact includes a main body and an elastic element. The elastic element is fixed to the upper end of the main body and bent towards the stationary contact. The moving contact is located between the normally open and normally closed contacts. The drive block is detachably mounted on the protrusion and has two trigger structures. One trigger structure is embedded inside the protrusion, and the other trigger structure abuts against the middle of the elastic element. The spring and the elastic element of the moving contact move separately and independently, reducing the likelihood of mutual interference and wobbling. This makes the spring and moving contact more stable during press operation.

Description

Technical Field

[0001] This utility model relates to the field of micro switches, and in particular to a novel micro switch structure. Background Technology

[0002] A micro switch is a switch with a small contact gap and a quick-acting mechanism. It is a switch that uses a specified stroke and a specified force to perform a switching action. It is covered by a housing and has a drive rod on the outside. Because the contact gap of the switch is relatively small, it is called a micro switch. It is also called a sensitive switch, quick-acting switch, or pressure-activated fast switch. It is used in door switches in anti-theft systems, etc.

[0003] In related technologies, a micro switch includes a housing, with a drive button or drive rod movably mounted on the outer wall of the housing. Inside the housing, there is a moving contact and a stationary contact. The moving contact includes a spring and a moving piece. The spring drives the moving piece to move away from the stationary contact. The moving contact is located on the sliding path of the drive button and the drive rod. When the drive button or drive rod moves, it drives the spring to move, so that the moving piece abuts against the stationary contact to achieve circuit connection.

[0004] In existing technology, a tension spring is often installed on the moving plate to drive it to reset. The two ends of the tension spring are hooked to the moving plate and the inner wall of the outer casing, respectively. The spring ends need to be connected to the moving plate, which is difficult to assemble and requires holes in the moving plate, resulting in a decrease in the strength and quality of the moving plate. Utility Model Content

[0005] The purpose of this invention is to provide a novel micro switch structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a novel micro switch structure, comprising:

[0007] The outer casing has a sliding groove formed on its side wall;

[0008] A drive button is provided on one side of the housing. A protrusion is provided on the surface of the drive button near the housing. One end of the drive button near the protrusion is slidably disposed inside the slide groove.

[0009] An elastic element is sandwiched between the lower end of the protrusion and the inner wall of the housing, and the protrusion and the elastic element are arranged sequentially along the sliding direction of the drive button;

[0010] A stationary contact piece, comprising a normally open contact piece and a normally closed contact piece, wherein the upper ends of the normally open contact piece and the normally closed contact piece are respectively provided with normally open contacts and normally closed contacts;

[0011] The movable contact includes a main body and an elastic sheet. The elastic sheet is fixed to the upper end of the main body and bent toward the stationary contact. The upper and lower ends of the elastic sheet extend away from the drive button. The lower end of the elastic sheet is provided with a movable contact, which is located between a normally open contact and a normally closed contact.

[0012] A drive block is detachably disposed at the end of the protrusion away from the drive button. The drive block has two trigger structures, one of which is embedded inside the protrusion and the other of which abuts against the middle of the elastic sheet.

[0013] Preferably, both of the trigger structures include an upper plane, a trigger groove, and a lower plane, the upper plane and the lower plane are symmetrically arranged, the upper plane, the trigger groove and the lower plane are connected in sequence along the sliding direction of the drive button, and the cross section of the trigger groove along the sliding direction of the drive button is an isosceles trapezoid.

[0014] Preferably, the lengths of the trigger slots in the two trigger structures are not equal.

[0015] Preferably, the normally open contact, normally closed contact, and moving contact are arranged at intervals along the direction away from the drive button.

[0016] Preferably, the inner wall of the slide groove is symmetrically provided with slide rails, and the protrusion is provided with a through groove that corresponds to and fits the slide rail with a clearance.

[0017] Preferably, the drive button has a baffle at the lower end of the surface near the housing, and the baffle is disposed between two slide rails.

[0018] Preferably, the lower end of the slide groove is provided with an opening communicating with the lower surface of the outer shell, the opening is set on the sliding track of the baffle, and the total length of the protrusion and the baffle is greater than or equal to the length of the slide groove.

[0019] Preferably, the drive button includes a sleeve, a connecting rod, and a button body, wherein the connecting rod is threaded into the inside of the sleeve, and the button body is disposed at the upper end of the connecting rod.

[0020] Preferably, the upper and lower ends of the elastic sheet extend obliquely away from the drive button, and the oblique angle α of the upper end of the elastic sheet and the oblique angle b of the lower end of the elastic sheet satisfy the following relationship: b≤45°≤a.

[0021] Preferably, the baffle is a rigid plate that fits with the opening gap or an elastic plate that fits with the opening interference fit.

[0022] The working principle of this invention is as follows: When the drive button is in the initial position (before the drive button is pressed), the middle part of the elastic plate abuts against the lower plane, and the moving contact contacts the normally closed contact to conduct electricity. When the drive button is pressed, the middle part of the elastic plate moves from the lower plane to the trigger groove, and the middle part of the elastic plate abuts against the bottom of the trigger groove, and the moving contact contacts the normally open contact to conduct electricity. When the drive button is pressed all the way down, the middle part of the elastic plate moves from the trigger groove to the upper plane, and the middle part of the elastic plate abuts against the upper plane, and the moving contact contacts the normally closed contact again to conduct electricity. When the drive button rebounds, the process is the reverse of the above process.

[0023] The beneficial effects of this invention are as follows: By setting different trigger structures at both ends of the drive block, the triggering time of the normally open contact can be changed. The elastic element acts on the protrusion and is located on the side of the stationary contact away from the moving contact. When the drive button is in the pressed state, the drive block drives the elastic sheet of the moving contact to swing and trigger the stationary contact. The spring and the elastic sheet of the moving contact will move separately and independently, and the spring is away from both the moving and stationary contacts, making it less likely for them to interfere with each other and cause shaking. The spring and the moving contact are more stable when the micro switch is pressed. This improves the structural and quality stability of the micro switch and ensures the strength and service life of the moving contact. Attached Figure Description

[0024] The accompanying drawings further illustrate the present invention, but the embodiments in the drawings do not constitute any limitation on the present invention.

[0025] Figure 1 This is a structural schematic diagram of an embodiment of the present invention.

[0026] The markings in the diagram are: 1: outer casing; 2: drive button; 3: protrusion; 4: drive block; 5: elastic element; 6: trigger structure; 7: moving contact; 8: elastic piece; 9: normally closed contact; 10: normally open contact; 11: baffle. Detailed Implementation

[0027] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0028] It should be noted that, in this utility model, unless otherwise stated, when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or an intervening element may be present simultaneously. When an element is referred to as "connected to" another element, it can be directly connected to the other element or an intervening element may be present simultaneously. The directional terms used, such as "up," "down," "left," and "right," generally refer to... Figure 1 The directions shown are up, down, left, and right. "Inner" and "outer" refer to the inner and outer parts of a specific outline. "Far" and "near" refer to the distance or proximity relative to a particular component.

[0029] like Figure 1 As shown in the figure, an embodiment of the present invention provides a novel micro switch structure, comprising:

[0030] The outer casing 1 has a sliding groove on its side wall;

[0031] Drive button 2, the drive button 2 is disposed on one side of the housing 1, the surface of the drive button 2 near the housing 1 is provided with a protrusion 3, and one end of the drive button 2 near the protrusion 3 is slidably disposed inside the slide groove;

[0032] The elastic element 5 is sandwiched between the lower end of the protrusion 3 and the inner wall of the outer shell 1. The protrusion 3 and the elastic element 5 are arranged sequentially along the sliding direction of the drive button 2. The elastic element 5 is a spring or a leaf spring.

[0033] A stationary contact piece, comprising a normally open contact piece 10 and a normally closed contact piece 9, wherein the upper ends of the normally open contact piece 10 and the normally closed contact piece 9 are respectively provided with normally open contacts and normally closed contacts;

[0034] The movable contact 7 includes a main body and an elastic sheet 8. The elastic sheet 8 is fixed to the upper end of the main body and bent toward the stationary contact. The upper and lower ends of the elastic sheet 8 extend away from the drive button 2. The lower end of the elastic sheet 8 is provided with a movable contact, which is located between the normally open contact and the normally closed contact.

[0035] The driving block 4 is detachably disposed at the end of the protrusion 3 away from the driving button 2. The driving block 4 is provided with two trigger structures 6, one of which is embedded inside the protrusion 3, and the other trigger structure 6 abuts against the middle of the elastic sheet 8.

[0036] Both trigger structures 6 include an upper plane, a trigger groove, and a lower plane, which are symmetrically arranged. The upper plane, trigger groove, and lower plane are sequentially connected along the sliding direction of the drive button 2. The cross-section of the trigger groove along the sliding direction of the drive button 2 is an isosceles trapezoid. When the middle part of the elastic sheet 8 abuts against the upper and lower planes, the moving contact and the normally open contact make contact and conduct. During the process of the drive button 2 being pressed and rebounding to reset, the moving contact and the normally open contact conduct twice at certain time intervals.

[0037] The lengths of the trigger slots of the two trigger structures 6 are not equal, and the total length of the trigger slots and the lower plane is equal to the displacement distance of the drive block 4. Since the length of the drive block 4 is constant, the lengths of the upper and lower planes will also change when the length of the trigger slots is changed. By changing the installation direction of the drive block 4, the positions of the two trigger structures 6 can be changed, and the closing and conduction time of the normally open contacts will have two different data.

[0038] The elastic element 5, normally open contact 10, normally closed contact 9, and moving contact 7 are arranged sequentially at intervals away from the drive button 2. The elastic force direction of the elastic element 5, the plane of the normally open contact 10, the plane of the normally closed contact 9, and the plane of the moving contact 7 are parallel to the sliding direction of the drive button 2.

[0039] The inner wall of the slide groove is symmetrically provided with slide rails, and the protrusion 3 has through grooves that correspond one-to-one with the slide rails with clearance fit. The slide rails are used to guide the protrusion 3 and the drive button 2.

[0040] The drive button 2 has a baffle 11 at the lower end of its surface near the housing 1, and the baffle 11 is positioned between the two slide rails. The baffle 11 is used to cover the slide rails and prevent water and dust from entering the slide rails.

[0041] The lower end of the slide groove has an opening communicating with the lower surface of the housing 1. The opening is located on the sliding track of the baffle 11. The total length of the protrusion 3 and the baffle 11 is greater than or equal to the length of the slide groove. By blocking the slide groove with the baffle 11, the baffle 11 can slide through the opening to the outside of the housing 1, increasing the travel of the drive button 2 and delaying the trigger time.

[0042] The drive button 2 includes a sleeve, a connecting rod, and a button body. The connecting rod is threaded into the inside of the sleeve, and the button body is fixed to the upper end of the connecting rod. Rotating the button body adjusts the distance between the button body and the sleeve. The sleeve has a hollow cuboid structure. The length of the sleeve is greater than the height of the outer shell 1.

[0043] The elastic sheet 8 extends obliquely at both ends in a direction away from the drive button 2. The length of the upper end of the elastic sheet 8 is greater than the length of the lower end. The oblique angle α of the upper end of the elastic sheet 8 and the oblique angle b of the lower end of the elastic sheet 8 satisfy the following relationship: b ≤ 45° ≤ α. Further, 45° ≤ α ≤ 55°, 5° ≤ b ≤ 20°. The middle part of the elastic sheet 8 protrudes towards the drive button 2, and the upper and lower ends of the elastic sheet 8 extend towards the main body, extending the upper end of the elastic sheet 8, making the upper end of the elastic sheet 8 the main area of ​​elastic deformation.

[0044] The baffle 11 is a rigid plate that fits with the opening gap or an elastic plate that fits with the opening interference fit.

[0045] The technical features of the embodiments described above can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these should all be considered to be within the scope of this specification.

Claims

1. A novel micro switch structure, characterized by: include: The outer casing has a sliding groove formed on its side wall; A drive button is provided on one side of the housing. A protrusion is provided on the surface of the drive button near the housing. One end of the drive button near the protrusion is slidably disposed inside the slide groove. An elastic element is sandwiched between the lower end of the protrusion and the inner wall of the housing, and the protrusion and the elastic element are arranged sequentially along the sliding direction of the drive button; A stationary contact piece, comprising a normally open contact piece and a normally closed contact piece, wherein the upper ends of the normally open contact piece and the normally closed contact piece are respectively provided with normally open contacts and normally closed contacts; The movable contact includes a main body and an elastic sheet. The elastic sheet is fixed to the upper end of the main body and bent toward the stationary contact. The upper and lower ends of the elastic sheet extend away from the drive button. The lower end of the elastic sheet is provided with a movable contact, which is located between a normally open contact and a normally closed contact. A drive block is detachably disposed at the end of the protrusion away from the drive button. The drive block has two trigger structures, one of which is embedded inside the protrusion and the other of which abuts against the middle of the elastic sheet.

2. The novel micro switch structure according to claim 1, wherein: Both of the aforementioned trigger structures include an upper plane, a trigger groove, and a lower plane. The upper plane and the lower plane are symmetrically arranged. The upper plane, the trigger groove, and the lower plane are connected sequentially along the sliding direction of the drive button. The cross-section of the trigger groove along the sliding direction of the drive button is an isosceles trapezoid.

3. The novel micro switch structure according to claim 2, wherein: The lengths of the trigger slots in the two trigger structures are not equal.

4. The novel micro switch structure according to claim 1, wherein: The normally open contact, normally closed contact, and moving contact are arranged at intervals along the direction away from the drive button.

5. The novel micro switch structure according to claim 1, wherein: The inner wall of the slide groove is symmetrically provided with slide rails, and the protrusions are provided with through grooves that correspond one-to-one with the slide rails and have clearance fit.

6. The novel micro switch structure according to claim 5, wherein: The drive button has a baffle at the lower end of its surface near the housing, and the baffle is positioned between two slide rails.

7. The novel micro switch structure according to claim 6, wherein: The lower end of the slide groove is provided with an opening that communicates with the lower surface of the outer shell. The opening is located on the sliding track of the baffle. The total length of the protrusion and the baffle is greater than or equal to the length of the slide groove.

8. The novel micro switch structure according to claim 1, wherein: The drive button includes a sleeve, a connecting rod, and a button body. The connecting rod is threaded into the inside of the sleeve, and the button body is located at the upper end of the connecting rod.

9. The novel micro switch structure according to claim 1, wherein: The upper and lower ends of the elastic sheet extend at an angle away from the drive button. The angle of inclination α at the upper end of the elastic sheet and the angle of inclination b at the lower end of the elastic sheet satisfy the following relationship: b≤45°≤a.

10. The novel micro switch structure according to claim 6, wherein: The baffle is a rigid plate that fits with the opening gap or an elastic plate that fits with the opening interference fit.

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