CN209880465U - Electrical equipment accessory - Google Patents

Abstract

The utility model relates to an electrical apparatus annex, this electrical apparatus annex, include: a terminal plate; the switch element is abutted against the side surface of the terminal board and can perform seesaw motion by taking the side surface of the terminal board as a fulcrum so as to complete the connection and the disconnection of current flowing through the switch element; wherein, the side of the terminal board is provided with a notch at the position of abutting with the switch element. The utility model discloses a butt department at switch element and terminal block sets up the notch, can prevent that this position from producing the protrusion because of machining error, and then has reduced the possibility that takes place the single-point contact for easily form stable point contact or face contact between switch element and the terminal block more, promote the qualification rate of product.

Description

Electrical equipment accessory

Technical Field

The utility model relates to an electrical technology field, more specifically say, the utility model relates to an electrical apparatus annex.

Background

In a conventional electrical accessory such as a switch, on/off of a circuit is generally controlled by a switching element, and as an example, a configuration capable of controlling on/off of a current I between a first terminal 3 and a second terminal 4 includes a terminal plate 1 of the first terminal 3 and a switching element 2, and the switching element 2 is in contact with a side surface 10 of the terminal plate 1 and is capable of performing a seesaw (seesaw) movement with the side surface 10 as a fulcrum, as shown in fig. 1.

A contact 20 is connected to one end of the switching element 2 along the length direction, when the end of the switching element 2 having the contact 20 is dropped, the contact 20 will make electrical contact with the second terminal 4, thereby turning on the current I between the first terminal 3 and the second terminal 4, the path and direction of the current I being schematically shown in fig. 1, and with continued reference to fig. 1, when the end of the switching element 2 having the contact 20 is lifted, the contact 20 will be separated from the second terminal 4, thereby turning off the current I between the first terminal 3 and the second terminal 4.

In order to ensure good electrical contact and temperature rise performance between terminal board 1 and switching element 2, a portion where terminal board 1 abuts switching element 2 (i.e., side surface 10 of terminal board 1) is generally arranged to be flat to increase a contact area between switching element 2 and terminal board 1. However, in the process of processing the side surface 10 of the terminal plate 1, it is difficult for the side surface 10 to be uniformly processed into a perfect plane with a projection formed due to a processing error existing in the processing. In some workpieces, referring to fig. 2, if a protrusion 102 is formed at the central portion of the side surface 10, the switching element 2 abutting on the protrusion 102 will make electrical contact with the terminal board 1 in the form of single-point contact, and the temperature rise performance of the electrical contact is difficult to meet the requirement, and the product is a defective product. Therefore, the abutment surface (i.e., the side surface 10) is arranged to be a flat surface, and when there is a machining error, the yield is likely to be lowered.

SUMMERY OF THE UTILITY MODEL

In view of the above problems in the prior art, the inventors of the present invention have found through continuous experiments and studies that the switching element can satisfy the requirement of the temperature rise performance as long as there is two-point contact with the terminal plate. In other words, it is possible to provide a connection structure of a switching element and a terminal plate, which can maintain stable two-point contact even under the influence of a processing error, and which can improve the yield of products.

The utility model provides an electrical apparatus annex, include: a terminal plate; the switch element is abutted against the side surface of the terminal board and can perform seesaw motion by taking the side surface of the terminal board as a fulcrum so as to complete the connection and the disconnection of current flowing through the switch element; wherein, the side of the terminal board is provided with a notch at the position of abutting with the switch element.

Specifically, the utility model discloses a butt department at switch element and terminal block sets up the notch, can prevent that this position from producing the protrusion because of machining error, and then has reduced the possibility of taking place the single-point contact for easily form stable two point contact or face contact between switch element and the terminal block more, promote the qualification rate of product.

In the preferred technical solution of the present invention, the notch is a U-shaped notch or a V-shaped notch. The U-shaped notch or the V-shaped notch is easy to process and provides stable support for the switching element and the terminal board.

In the preferred technical solution of the present invention, the cross-sectional shape of the notch is formed by a straight line, a curved line or a combination of a straight line and a curved line.

In the preferred embodiment of the present invention, the butt between the switching element and the terminal plate is two-point contact or surface contact.

In a preferred embodiment of the present invention, the side of the terminal plate for abutting against the switching element is formed into a pointed end. The side formed as the tip can serve as a fulcrum of the switching element, supporting the switching element for more stable seesaw movement.

Further, in the preferred technical solution of the present invention, a groove is provided on the switch element, the switch element is accommodated and abutted by the groove to form a side face of the tip, and the shape of the groove is preferably V-shaped. With the groove provided corresponding to the side face, it is possible to further help stabilize the position of the switching element.

In a preferred embodiment of the invention, the width of the top of the recess is 1/4-1/2 of the width of the abutment surface of the switching element. The width of the top of the notch is increased, so that stable two-point contact or surface contact between the switch element and the terminal board can be effectively facilitated, the contact area between the switch element and the terminal board is reduced along with the increase of the width, the stress of the switch element attached to the terminal board is concentrated by extruding the switch element, the switch element is usually made of metal materials such as copper and aluminum with certain ductility, the switch element is contacted with the terminal board more practically under the extrusion of the stress, and the temperature rise performance of a product can meet the requirement. Meanwhile, the ratio is not suitable to be too large to prevent the stability of the support from being affected and the contact area from being excessively reduced, and by setting the upper limit of the ratio of the width of the top of the notch to the width of the abutting surface of the switching element to 1/2, the contact can be ensured without affecting the overall temperature rise performance of the product.

The utility model discloses an among the preferred technical scheme, electrical accessories still includes the storage tank, and the storage tank has a plurality of holders, and the terminal block utilizes the holder and is erect at the tank bottom of storage tank, and its one side of keeping away from the tank bottom of storage tank utilizes side butt switching element.

Further, in the preferred embodiment of the present invention, the switch element has a protrusion extending in a width direction thereof, and the switch element is retained by the retaining member by the protrusion and is limited in a length direction. The clamping piece is used for clamping the terminal board and the switch element at the same time, so that the movable rocker structure formed by the switch element and the terminal board can be borne by a simple device.

In the preferred technical solution of the present invention, the electrical accessory is a switch.

Drawings

FIG. 1 is a schematic diagram of a prior art current on/off control structure for an electrical accessory;

FIG. 2 is a schematic view showing a connection structure of a terminal block and a switching element in the case of a processing error in the structure of FIG. 1;

fig. 3 is a schematic diagram (exploded view) of a switch structure in the present embodiment;

fig. 4 is a schematic view of a seesaw structure composed of a terminal plate and switching elements in the embodiment of fig. 3;

FIG. 5 is a schematic structural view of the contact portion between the terminal plate and the switch element in the embodiment of FIG. 3;

fig. 6 is a schematic view (front view) of the paddle structure of the embodiment of fig. 3;

fig. 7 is a schematic view of the mounting structure of the rocker structure in the housing in the embodiment of fig. 3.

Reference numerals:

1-terminal board, 10-side, 102-projection, 11-notch, 2-switch element, 20-contact, 22-groove, 24-projection, 3-first terminal, 4-second terminal, 5-reversing handle, 6-spring, 7-reversing head, 8-shell, 81-containing groove, 82-clamping piece.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in general with reference to the accompanying drawings. The embodiments of the present invention are not limited to the following embodiments, and various embodiments within the technical concept of the present invention can be adopted.

It should be noted that in the description of the preferred embodiments of the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the devices or components must have specific orientations, be constructed and operated in specific orientations, and thus, should not be construed as limiting the present invention.

The present embodiment provides a switch structure capable of controlling on/off of a circuit between two terminals, referring to fig. 3, the switch structure includes a reversing handle 5, a spring 6, a reversing head 7, a switch element 2, a terminal board 1, a first terminal 3, a second terminal 4, and a housing 8, wherein the reversing handle 5 is installed on a side facing a user, and the user can complete switching on/off of the circuit by directly or indirectly pressing upper and lower ends of the reversing handle 5.

Specifically, the reversing handle 5 is provided with a groove body (not shown) suitable for accommodating the spring 6 and the reversing head 7 at one side far away from the installation of the user, and the spring 6 enters the groove body of the reversing handle 5 and is fixed in the groove body after being connected with the tail part of the reversing head 7 in a plugging manner. The head of the commutator head 7, when assembled, abuts against the middle of the switching element 2 for driving the switching element 2 to move in a seesaw manner. The terminal board 1 is disposed on the side of the switching element 2 remote from the user, and a side surface 10 (see fig. 4) thereof abuts against the switching element 2. Switching element 2 can perform a seesaw movement with a contact position with side surface 10 of terminal plate 1 as a fulcrum.

When a user directly or indirectly presses the upper end face of the reversing handle 5 to drive the reversing handle 5 to rotate along the direction a of fig. 3, the reversing handle 5 drives the abutting position of the head of the reversing head 7 on the switch element 2 to move downwards by the cooperation between the groove body of the reversing handle 5 and the spring 6 and the reversing head 7 until the abutting position moves from the first side (the upper side in fig. 3, namely, the side having the contact 20) to the second side (the lower side in fig. 3) of the pivot point of the seesaw movement of the switch element 2, and applies pressure to the second side of the pivot point of the switch element 2 by the restoring force of the spring 6, so that the switch element 2 keeps the state that the first side having the contact 20 is lifted and the second side is fallen, and the contact 20 of the switch element 2 with the first side in the lifted state is separated from the second terminal 4.

When the user directly or indirectly presses the lower end surface of the reversing lever 5 to drive the reversing lever 5 to rotate in the direction B of fig. 3, the head of the reversing head 7 moves from the second side to the first side of the fulcrum of the seesaw movement of the switching element 2, and applies pressure to the first side of the fulcrum of the switching element 2 by the restoring force of the spring 6, so that the switching element 2 maintains the state that the first side having the contact 20 falls and the second side rises, and the contact 20 of the switching element 2 in the falling state on the first side is electrically contacted with the second terminal 4.

The first terminal 3 and the second terminal 4 are used for connecting the live wire and the neutral wire of the mains supply, and voltage is applied between the live wire and the neutral wire when the installation is finished. Since the terminal plate 1 of the first terminal 3 is electrically connected to the switching element 2, a voltage is also applied between the switching element 2 and the second terminal 4. When the contact 20 of the switching element 2 is separated from the second terminal 4, although a voltage is applied between the switching element 2 and the second terminal 4, no current flows, and the circuit remains open; when the contact 20 is in electrical contact with the second terminal 4, current can flow through the terminal board 1 and the switching element 2, and electrical conduction between the first terminal 3 and the second terminal 4 is achieved.

Referring to fig. 4, in the present embodiment, a side surface 10 of the terminal board 1 is provided with a notch 11 at a position abutting against the switching element 2. In the present embodiment, the cross-sectional shape of the notch 11 is a V shape formed by a combination of curved lines, and the notch 11 having this shape is easy to cut and has good workability. The V-shape is only an example, and in other embodiments of the present invention, the cross-section of the recess 11 may be formed in any suitable pattern formed by straight lines, curved lines, or a combination of straight lines and curved lines, and may be a U-shaped recess in some embodiments. By additionally arranging the notch 11 on the side surface 10, a protrusion generated due to a machining error at a position where the notch 11 is arranged can be prevented, the protrusion can cause a single-point contact, the possibility of the single-point contact is reduced by utilizing the two-point contact of the notch 11, the switch element 2 can be stably erected on the terminal board 1 at two sides of the notch 11, the stable two-point contact or the surface contact between the switch element 2 and the terminal board 1 is ensured, and the product yield is improved.

In the present embodiment, the side surface 10 is formed so that the tip, i.e., the width of the side surface 10 is smaller than the thickness of the main body of the terminal plate 1. When the side surface 10 formed as the tip end is used as the fulcrum of the switching element 2, the periodic deviation of the rotation axis of the switching element 2 during the seesaw movement can be prevented, and the seesaw movement is further stabilized, thereby improving the service life of the switch. In cooperation therewith, referring to fig. 5, the switch element 2 is provided with a groove 22 for abutting against the side face 10 formed as the tip, and the groove 22 is opened in the width direction (width direction in fig. 7) of the switch element 2 and can restrict the abutting position between the switch element 2 and the side face 10 in cooperation with the side face 10 formed as the tip to ensure the stability of the abutting position as the fulcrum of the seesaw movement of the switch element 2.

Referring to fig. 6, the ratio of the width D of the top of the notch 11 to the width D of the abutment surface of the switching element 2 is 1/4 to 1/2, which in the present embodiment is 1/3. This ratio is not suitable to be too large, nor too small. By increasing the ratio, on the one hand, the switching element 2 can be helped to cross the notch 11 and be erected on the terminal board 1 at two sides of the notch 11, so that the terminal board 1 and the switching element 2 form more stable two-point contact or surface contact; on the other hand, along with the increase of the proportion, the contact area of the terminal board 1 and the switch element 2 is reduced, and the stress of pressing the switch element 2 to make the switch element 2 attach to the terminal board 1 is more concentrated, but in the embodiment, because the switch element 2 is made of copper material, on the one hand, the switch element has better conductivity, on the other hand, the switch element has better ductility, and can form more reliable contact with the terminal board 1 under the extrusion of the stress, so that the contact area of the abutting point is increased, and the temperature rise performance of the product is ensured to meet the requirement. Further, by limiting the ratio to 1/2, it is possible to ensure the stability of the support of the terminal plate 1 for the switching element 2, and to prevent the contact area from being excessively reduced, which leads to an unnecessary loss of the temperature rise performance of the entire product.

Referring to fig. 3 and 7, the switch structure provided by the present embodiment further includes a housing 8 for accommodating the first terminal 3, the second terminal 4, and the switch element 2, the housing 8 being capable of being snapped onto a panel body (not shown) of the switch, a receiving groove 81 is formed at a side facing a user in an assembled state, four holding members 82 are provided at a central portion of the receiving groove 81 along a length direction thereof (in fig. 7, the length direction of the receiving groove 81 is the same as the length direction of the switching element 2 in the assembled state, and indicated by the same double-headed arrow in fig. 7), the terminal board 1 is held by the four holding members 82, is fixed while standing on a bottom of the receiving groove 81, is completely inserted into the receiving groove 81, and is inserted into the terminal board 1 at the bottom of the receiving groove 81, the top of which will remain lower than the notch position of the receiving groove 81 (or the top position of the clamping member 82), the plane of the top of the terminal board 1 being the side 10 for abutting against the switching element 2.

Referring to fig. 6 and 7, the switching element 2 has the projection 24 extending in the width direction thereof, and similarly to the terminal board 1, the switching element 2 enters the accommodation groove 81 and abuts on the side face 10 of the terminal board 1, and is rotatably connected to the terminal board 1. The protrusion 24 of the opening and closing member 2 entering the receiving groove 81 is held by the four holding members 82 to restrict the position of the opening and closing member 2 in the longitudinal direction thereof. Through above connection form, in this embodiment, storage tank 81 on casing 8 utilizes the same group, totally four holder 82, has realized simultaneously that fixed and carry out the support and spacing of the axis of rotation of wane motion to switch element 2 to the terminal board 1 to bear the mobilizable wane structure that terminal board 1 and switch element 2 both formed.

So far, the technical solution of the present invention has been described with reference to the accompanying drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, a person skilled in the art can make equivalent changes or substitutions to the related technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims (10)

1. An electrical accessory, comprising:

a terminal plate;

a switching element which is abutted against a side surface of the terminal plate and can perform a seesaw motion with the side surface of the terminal plate as a fulcrum to complete on and off of a current flowing through the switching element;

wherein the side surface of the terminal plate is provided with a notch at a position abutting against the switching element.

2. The electrical accessory of claim 1, wherein the notch is a U-shaped notch or a V-shaped notch.

3. The electrical accessory according to claim 1 or 2, wherein the cross-sectional shape of the recess is formed by a straight line, a curved line or a combination of a straight line and a curved line.

4. The electrical accessory according to claim 1, wherein the abutment between the switching element and the terminal plate is a two-point contact or a surface contact.

5. The electrical accessory according to claim 1, wherein the side face of the terminal board for abutting against the switch element is formed as a tip.

6. Electrical accessory according to claim 5, characterised in that the switching element is provided with a groove with which the switching element abuts against the side surface formed as a tip.

7. The electrical accessory according to any one of claims 1, 2, 4-6, wherein a width of a top of the notch is 1/4-1/2 of a width of the abutment surface of the switch element.

8. The electrical accessory according to claim 1, further comprising a receiving groove having a plurality of holding pieces, wherein the terminal plate is erected on a bottom of the receiving groove by the holding pieces, and a side thereof away from the bottom of the receiving groove abuts against the switching element by the side surface.

9. The electrical accessory according to claim 8, wherein the switching element has a projection extending in a width direction thereof, and the switching element is retained in a length direction by the projection being retained by the retaining member.

10. The electrical accessory of any one of claims 1, 2, 4-6, 8, 9, wherein the electrical accessory is a switch.