Sun shield micro switch
The surface contact and detachable connection design solves the problem of current blockage caused by poor contact and sparking in micro switches, improves stability and reduces usage costs.
Patent Information
- Application Number
- CN202422627799.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-10-29
AI Technical Summary
When the moving and stationary contacts of a micro switch are connected in a point contact manner, they are prone to current blockage due to poor contact, sparking, and foreign matter inclusion.
The surface contact method is adopted to make the contact area between the moving contact piece and the static contact piece larger, and the detachable connection between the moving contact piece and the contact handle is realized through the snap fit of the buckle and the fixing hole, and the guide column is provided to ensure the consistency of the force of the elastic part.
The occurrence of poor contact is reduced, the use cost is reduced, and the stability and service life of the micro switch are improved.
Smart Images
Figure CN223321154U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of micro switches, and in particular to a sun visor micro switch. Background Art
[0002] Micro switches are widely used in automotive sun visors. They not only improve the functionality of the sun visor, but also enhance the user experience and driving safety. As automotive technology continues to advance, the application of micro switches in sun visors is likely to become more diverse and intelligent.
[0003] In the related art, the moving contact piece and the stationary contact piece in the micro switch are connected by point contact. The elastic action of the elastic member is used to connect or separate the moving contact piece and realize the conduction or disconnection of the current.
[0004] In actual use, it is found that when the moving contact and the static contact of the micro switch are connected in a point contact manner, the contact area is small. When the contact point is mixed with foreign matter or slightly oxidized locally, it is easy to cause poor contact, resulting in problems with current flow; and, there is a spark phenomenon at the moment when the moving contact and the static contact make point contact, and after the spark, an insulating layer gradually forms on the surface of the moving contact and the static contact, which is easy to cause poor contact and cause problems with current flow. Utility Model Content
[0005] In order to improve the problem of poor contact between the moving contact piece and the static contact piece resulting in current blockage when the micro switch is used, the present application provides a sun visor micro switch.
[0006] The present application provides a sun visor micro switch, which adopts the following technical solution:
[0007] A sun visor micro switch comprises a switch box and an elastic member, a contact handle, a moving contact piece and a static contact piece installed in the switch box, the contact handle being slidably installed in the switch box, and one end of the contact handle extending from the switch box; the moving contact piece is fixed on the contact handle and moves synchronously with the contact handle; there are at least two static contact pieces, and the static contact pieces are respectively fixed in the switch box; the elastic member acts on the contact handle to push the moving contact piece to abut against the static contact piece; one end of the static contact piece is respectively connected to the circuit connecting wire, and the other end of the static contact piece is respectively provided with a second connecting hole; the end faces of the moving contact piece in contact with the static contact piece are respectively provided with protrusions, and the hole walls of the second connecting holes are used to abut against the protrusions to achieve current conduction.
[0008] By adopting the above technical solution, when a force acts on the contact handle, the contact handle moves and the moving contact piece moves synchronously, so that the moving contact piece is separated from the static contact piece, thereby disconnecting the current; when stationary, the contact handle moves under the action of the elastic force of the elastic member until the moving contact piece abuts against the static contact piece, and the protrusions of the moving contact piece abut against the hole walls of the second connecting hole of the static contact piece to form an annular contact surface; the surface contact method makes the contact area between the moving contact piece and the static contact piece larger, which can reduce poor contact caused by local slight oxidation of the contact point, poor contact caused by the seesaw state of the moving contact piece, or poor contact caused by sparking; at the same time, if foreign matter is mixed in the contact part, the foreign matter can fall out directly from the second connecting hole, which can reduce the situation of poor contact caused by foreign matter.
[0009] Optionally, two static contact pieces are provided, and the two static contact pieces are symmetrically distributed on both sides of the touch handle with the touch handle as the symmetry axis, and the dynamic contact piece is installed at one end of the static contact piece close to the elastic member.
[0010] By adopting the above technical solution, the two static contact pieces are symmetrically distributed with the contact handle as the symmetry axis, which can make the conductive performance of the micro switch more stable and extend the service life of the micro switch; and the dynamic contact piece is installed at the end of the static contact piece close to the elastic member, and the dynamic contact piece can be separated from the two static contact pieces by pushing the contact handle, which is convenient to operate and highly practical.
[0011] Optionally, the dynamic contact piece includes a fixed part and two contact parts, the two contact parts are respectively fixed vertically at the two ends of the fixed part, and the two contact parts are located on the same side of the fixed part; the fixed part is detachably connected to the contact handle, and the protrusion is located at one end of the contact part close to the second connecting hole.
[0012] By adopting the above technical solution and providing the fixing portion and the two contact portions, the connection between the moving contact piece and the stationary contact piece is facilitated. When using the micro switch, the current can be disconnected by only moving the moving contact piece, which is convenient for operation.
[0013] Optionally, the fixing portion and the two contact portions are integrally formed.
[0014] By adopting the above technical solution, the fixing portion and the two contact portions are integrally formed, which facilitates the production of parts and the assembly of the micro switch.
[0015] Optionally, a fixing hole is provided on the fixing portion, and a buckle is provided on the touch handle, and the buckle is snapped into the fixing hole.
[0016] By adopting the above technical solution, the detachable connection between the moving contact piece and the contact handle is achieved through the snap-fitting of the buckle and the fixing hole; when the moving contact piece causes poor contact of the micro switch due to local oxidation, damage or other problems, only the moving contact piece can be replaced, thereby reducing the cost of use.
[0017] Optionally, the switch box includes a box body and a cover body, a box body plug-in portion is protruding from the side of the static contact piece close to the box body, a box body plug-in groove for plugging in the box body plug-in portion is provided at the end of the box body away from the cover body, and a box body clamping groove for clamping the static contact piece is provided on the side wall of the box body.
[0018] By adopting the above technical solution, during installation, the static contact piece is clamped into the box body clamping groove, and then the box body plugging part is plugged into the box body plugging groove, so that the static contact piece can be fixedly installed in the box body, which is easy to operate.
[0019] Optionally, a cover body plug-in portion is protruding from a side of the static contact piece opposite to the box body plug-in portion, and a cover body plug-in groove for plugging the cover body plug-in portion is provided on the cover body.
[0020] By adopting the above technical solution, the coordinated use of the box body snap-in groove, the box body plug-in groove and the cover body plug-in groove can limit the horizontal and vertical positions of the static contact piece, and the static contact piece can be more firmly installed in the box body and the cover body.
[0021] Optionally, limit plates are fixed on either side of the handle, and the two limit plates and the inner wall of the switch box form a sliding groove, and the handle is slidably installed in the sliding groove along the axis of the sliding groove. By adopting the above technical solution, the limit plates restrict the sliding position of the handle, so that the handle can only slide in the sliding groove along the axis of the sliding groove.
[0022] Optionally, a guide post is fixed on the slot wall of the sliding slot at one end away from the touch handle, one end of the elastic member is sleeved on the guide post, and the other end of the elastic member is fixed on the touch handle.
[0023] By adopting the above technical solution, it is ensured that the force acting on the elastic member is consistent with the direction of its axis, so that the elastic member is evenly stressed, the working performance and service life of the elastic member are improved, and the stability of the micro switch is improved.
[0024] In summary, this application includes at least one of the following beneficial technical effects:
[0025] 1. By adopting a surface contact method, the contact area between the moving contact piece and the static contact piece is increased, which can reduce poor contact caused by local slight oxidation of the contact point, poor contact caused by the seesaw state of the moving contact piece, or poor contact caused by sparking. At the same time, if foreign matter is caught in the contact part, the foreign matter can fall directly out of the second connection hole, which can reduce the situation of poor contact caused by foreign matter.
[0026] 2. The movable contact piece and the contact handle are detachably connected by the snap fit in the fixing hole. If the movable contact piece has poor contact due to local oxidation or damage, only the movable contact piece can be replaced, reducing the cost of use.
[0027] 3. By setting the guide column, it is ensured that the force of the elastic part is consistent with the direction of its axis, so that the elastic part is evenly stressed, the working performance and service life of the elastic part are improved, and the stability of the micro switch is improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;
[0029] Figure 2 Schematic diagram of the structure of the box body and the interior of the box body according to an embodiment of the present application;
[0030] Figure 3 is a schematic structural diagram of the movable contact piece according to an embodiment of the present application;
[0031] Figure 4 This is a schematic structural diagram of a static contact piece according to an embodiment of the present application;
[0032] Figure 5 is a cross-sectional view of the embodiment of the present application when the movable contact piece and the stationary contact piece are in contact;
[0033] Figure 6 It is a schematic diagram of the partial structure of the box body and the interior of the box body according to an embodiment of the present application.
[0034] Figure numerals: 1. switch box; 11. box body; 111. limit plate; 112. sliding groove; 113. box body plug-in groove; 114. box body snap-in groove; 12. cover body; 121. cover body plug-in groove; 2. guide column; 3. elastic member; 4. contact handle; 41. buckle; 5. moving contact piece; 51. fixing part; 52. contact part; 53. bump; 54. fixing hole; 6. static contact piece; 61. first connecting hole; 62. second connecting hole; 63. box body plug-in part; 64. cover body plug-in part. DETAILED DESCRIPTION
[0035] The following is combined with Figure 1-6 This application is described in further detail.
[0036] The present application discloses a sun visor micro switch, referring to Figure 1 and Figure 2, including a switch box 1 and an elastic member 3, a contact handle 4, a moving contact piece 5 and a static contact piece 6 installed in the switch box 1, the contact handle 4 is slidably installed in the switch box 1, and one end of the contact handle 4 extends from the switch box 1 for controlling the micro switch; one end of the elastic member 3 is fixedly connected to the inner side wall of the switch box 1, and the other end of the elastic member 3 is fixedly connected to the contact handle 4 to push the moving contact piece 5 to abut against the static contact piece 6; the dynamic contact piece 5 is fixedly installed on the contact handle 4, and the dynamic contact piece 5 can move synchronously with the contact handle 4; there are two static contact pieces 6, the two static contact pieces 6 are symmetrically distributed on both sides of the contact handle 4 with the contact handle 4 as the symmetry axis, and the two static contact pieces 6 are both located at the end of the moving contact piece 5 away from the elastic member 3; one end of the static contact piece 6 extends from the side wall of the switch box 1 for connecting to the circuit connecting wire, and the other end of the static contact piece 6 is fixedly installed in the switch box 1 for abutting against the moving contact piece 5 to conduct the current.
[0037] When the contact handle 4 is pushed, the elastic member 3 is deformed, and the contact handle 4 drives the movable contact piece 5 to move in the direction of the elastic member 3, so that the movable contact piece 5 is separated from the two static contact pieces 6, thereby disconnecting the current; when the force on the contact handle 4 is removed, the contact handle 4 and the movable contact piece 5 move in the direction away from the elastic member 3 under the action of the elastic force of the elastic member 3 until the movable contact piece 5 abuts against the two static contact pieces 6 at the same time, thereby realizing the conduction of the current.
[0038] The switch box 1 includes a box body 11 and a cover 12, which are connected by a snap-fit mechanism. The contact handle 4 is cylindrical or rectangular, with two limit plates 111 fixed to the interior of the box body 11. The two limit plates 111 and the inner wall of the box body 11 form a sliding groove 112. The contact handle 4 is located in the sliding groove 112 and can slide along the axis of the sliding groove 112 to limit the sliding position and direction of the contact handle 4.
[0039] Reference Figure 2 and Figure 3 The movable contact piece 5 includes a fixed portion 51 and two contact portions 52. Both the fixed portion 51 and the two contact portions 52 are long, plate-like structures. The two contact portions 52 are vertically fixed to the ends of the fixed portion 51 and are located on the same side of the fixed portion 51. The fixed portion 51 and the two contact portions 52 are integrally formed. The ends of the two contact portions 52 facing the stationary contact piece 6 are each provided with a protrusion 53, which is used to connect with the stationary contact piece 6.
[0040] Furthermore, a circular fixing hole 54 is defined in the fixing portion 51, and a clip 41 is provided on the contact handle 4. By snapping the clip 41 into the fixing hole 54, the contact handle 4 and the movable contact piece 5 are removably connected. If the movable contact piece 5 experiences poor contact due to local oxidation or damage, the microswitch can simply be replaced, reducing operational costs. In this embodiment, the contact handle 4 is made of polyoxymethylene (POM UV90ZXAP2), and the movable contact piece 5 is made of tin bronze (QSn6.5-0.1 Y1) or brass (H62Y).
[0041] Reference Figure 4 and Figure 5 The static contact piece 6 has an L-shaped structure, with a first connection hole 61 and a second connection hole 62 defined on either side. The first connection hole 61 is used to connect to the circuit connection wire, while the wall of the second connection hole 62 abuts against the protrusion 53 to form an annular contact surface. This annular contact surface ensures surface contact between the dynamic contact piece 5 and the static contact piece 6, increasing the contact area and reducing contact failures caused by minor localized oxidation of the contact point, the seesaw state of the dynamic contact piece 5, or sparking. Furthermore, if foreign matter becomes trapped between the contact portion 52 and the static contact piece 6, it can be directly removed through the second connection hole 62, reducing the risk of contact failure caused by foreign matter. In this embodiment, the static contact piece 6 is made of tin bronze (QSn6.5-0.1 Y1) or brass (H62 Y).
[0042] Reference Figure 4 and Figure 6 The end of the static contact 6 near the second connection hole 62 is provided with a protruding case inserting portion 63. The case inserting portion 63 is located on the side of the static contact 6 near the case body 11. The end of the case body 11 away from the cover 12 is provided with a case inserting slot 113, which is used to insert and mate with the case inserting portion 63. At the same time, the side wall of the case body 11 is provided with a case engaging slot 114, into which the static contact 6 is engaged. During installation, the static contact 6 is first engaged with the case engaging slot 114, and then the case inserting portion 63 is inserted into the case inserting slot 113 to securely install the static contact 6 in the case body 11.
[0043] Reference Figure 1 and Figure 4On the side of the static contact piece 6 opposite to the box body inserting portion 63, a cover body inserting portion 64 is protruded. The cover body inserting groove 121 is formed on the cover body 12. The cover body inserting groove 121 is used to insert and cooperate with the cover body inserting portion 64. During installation, the static contact piece 6 is first snapped into the box body snapping groove 114, then the box body inserting portion 63 is inserted into the box body inserting groove 113, and then the cover body inserting portion 64 is inserted into the cover body inserting groove 121. Through the coordinated use of the box body snapping groove 114, the box body inserting groove 113, and the cover body inserting groove 121, the static contact piece 6 is limited in both the horizontal and vertical directions, so that the static contact piece 6 is more firmly installed in the box body 11 and the cover body 12.
[0044] Reference Figure 6 In this embodiment, the elastic member 3 is a compression spring. A guide post 2 is fixed to the wall of the sliding slot 112 at the end away from the handle 4. The guide post 2 is integrally formed with the housing 11. Sleeving the compression spring onto the guide post 2 ensures that the spring's force is aligned with its axis, resulting in uniform force distribution on the spring. This improves the spring's performance and service life, while also enhancing the stability of the microswitch.
[0045] The implementation principle of a sun visor microswitch disclosed in an embodiment of the present application is: when the contact handle 4 is pushed, the compression spring is deformed, and the contact handle 4 drives the moving contact piece 5 to move in the direction of the compression spring, so that the protrusion 53 of the moving contact piece 5 is separated from the hole walls of the second connecting holes 62 of the two static contact pieces 6, thereby disconnecting the current; when the force on the contact handle 4 is cancelled, the elastic force of the compression spring is used to make the contact handle 4 slide toward the end away from the compression spring until the two protrusions 53 respectively abut against the hole walls of the two corresponding second connecting holes 62 to form an annular contact surface, thereby realizing the conduction of current.
[0046] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.
Claims
1. A sun visor micro switch, characterized in that: The invention comprises a switch box (1) and an elastic member (3), a contact handle (4), a movable contact piece (5) and a static contact piece (6) installed in the switch box (1), wherein the contact handle (4) is slidably installed in the switch box (1), and one end of the contact handle (4) extends out of the switch box (1); the movable contact piece (5) is fixed on the contact handle (4) and moves synchronously with the contact handle (4); at least two static contact pieces (6) are provided, and the static contact pieces (6) are respectively fixed in the switch box (1); the elastic member (3) acts on the contact handle (4) to push the movable contact piece (5) to abut against the static contact piece (6); one end of the static contact piece (6) is respectively connected to a circuit connection wire, and the other end of the static contact piece (6) is respectively provided with a second connection hole (62); the end surfaces of the movable contact piece (5) and the static contact piece (6) in contact are respectively provided with a convex point (53), and the hole wall of the second connection hole (62) is used to abut against the convex point (53) to achieve current conduction.
2. A sun visor micro switch according to claim 1, characterized in that: Two static contact pieces (6) are provided, and the two static contact pieces (6) are symmetrically distributed on both sides of the touch handle (4) with the touch handle (4) as a symmetry axis. The dynamic contact piece (5) is installed at one end of the static contact piece (6) close to the elastic member (3).
3. A sun visor micro switch according to claim 2, characterized in that: The movable contact piece (5) comprises a fixing portion (51) and two contact portions (52), wherein the two contact portions (52) are respectively fixed vertically to the two ends of the fixing portion (51), and the two contact portions (52) are both located on the same side of the fixing portion (51); the fixing portion (51) is detachably connected to the contact handle (4), and the protrusion (53) is located at one end of the contact portion (52) close to the second connection hole (62).
4. A sun visor micro switch according to claim 3, characterized in that: The fixing portion (51) and the two contact portions (52) are integrally formed.
5. A sun visor micro switch according to claim 4, characterized in that: A fixing hole (54) is provided on the fixing portion (51), a buckle (41) is provided on the touch handle (4), and the buckle (41) is snap-fitted into the fixing hole (54).
6. A sun visor micro switch according to claim 2, characterized in that: The switch box (1) comprises a box body (11) and a cover body (12); a box body plug-in portion (63) is protrudingly provided on a side of the static contact piece (6) close to the box body (11); a box body plug-in slot (113) for plugging into the box body plug-in portion (63) is provided on an end of the box body (11) away from the cover body (12); and a box body clamping slot (114) for clamping the static contact piece (6) is provided on a side wall of the box body (11).
7. A sun visor micro switch according to claim 6, characterized in that: A cover body plug-in portion (64) is protruding from one side of the static contact piece (6) opposite to the box body plug-in portion (63), and a cover body plug-in slot (121) for plugging the cover body plug-in portion (64) is provided on the cover body (12).
8. The sun visor micro switch according to claim 1, characterized in that: Limiting plates (111) are fixed on both sides of the contact handle (4), and the two limiting plates (111) and the inner wall of the switch box (1) form a sliding groove (112). The contact handle (4) is slidably installed in the sliding groove (112) along the axial direction of the sliding groove (112).
9. The sun visor micro switch according to claim 8, characterized in that: A guide column (2) is fixed to the groove wall of the sliding groove (112) at one end away from the touch handle (4); one end of the elastic member (3) is sleeved on the guide column (2); and the other end of the elastic member (3) is fixed to the touch handle (4).