CN201069750Y - Safety protection switch - Google Patents

Abstract

A safety protection switch comprising: the top of the switch shell is provided with an opening; a switch button pivotally connected within the opening of the switch housing; the two conductive metal sheets penetrate through the bottom of the switch shell and extend outwards; and one end of the double-alloy sheet is fixedly connected and electrically connected with the conductive metal sheet, the other end of the double-alloy sheet is a non-fixed connecting end, and the end is linked with the switching button so as to be contacted with or separated from the other conductive metal sheet. The safety protection switch also comprises an actuating reed which is positioned between the switching button and the double-alloy sheet, and the actuating reed is fixed on the switching button. The utility model has the characteristics of simple structure, low in cost protects effectually etc, has the location moreover and switches the button and not receive the function that the influence of external force freely jumped off when electric current transships.

Description

safety switch

technical field

The utility model relates to an electrical switch, in particular to a safety protection switch capable of preventing improper electrical conduction and providing current overload protection.

Background technique

In order to prevent improper electrical conduction and provide current overload protection, and at the same time achieve the purpose of providing protection for equipment, switches provided in the prior art are usually equipped with safety protection devices. And this safety protection device that provides protection for the switch is roughly divided into two types: one is the traditional method of installing a fuse inside the switch; The double alloy sheet method.

The elastic bialloy sheet is a specially formed metal sheet. When the current passing through the switch is too large, the elastic bialloy sheet expands and stretches as the temperature rises, and bends and jumps in the opposite direction, so as to achieve cut-off purpose of power.

According to the nature of the bialloy sheet, the side with a high expansion coefficient will bend to the low expansion coefficient when it is heated; on the contrary, when the temperature is too low, the bialloy sheet will bend to the other side, which will cause The accidental improper conduction of the circuit, and the switch of the elastic double alloy sheet used above has a problem of improper and accidental conduction when it encounters low temperature, resulting in damage to electrical appliances, and this problem is in cold areas. more serious.

In order to solve this problem, the inventor of this case previously applied for a patent No. 03280756.2, a Chinese utility model patent named protection switch. The improvement of the protection switch is that the protection switch includes: a switch housing, a A switch button, two conductive metal sheets, a double alloy sheet and at least one supporting element, wherein one end of the double alloy sheet is fixedly connected and electrically connected to the one conductive metal sheet, and the other end of the double alloy sheet is linked with the switch button so as to be connected to the other The conductive metal sheets are in contact or separated; one side of the switch button is provided with at least one accommodating hole, and an elastic element and a positioning element are installed in the accommodating hole; There is a positioning hole; the supporting element is arranged through the bottom of the switch housing, and the supporting element abuts against the double alloy sheet.

The protection switch realizes avoiding improper conduction of the protection switch, and can flexibly adjust the elastic fulcrum of the double alloy sheet, thereby reducing the defective rate of products. However, its structure is relatively complicated, which correspondingly increases the production cost of a single product, and is not suitable for mass production in an assembly line. Moreover, the protection switch provided by this patent cannot freely jump out when it is blocked by an external force. There are still certain security risks.

Contents of the invention

The purpose of the utility model is to provide a simple structure, low cost, etc. The protection effect is good, and it is a safety protection switch with the function of positioning the switching button and free tripping without the influence of external force when the current is overloaded.

In order to achieve the above object, the technical scheme adopted by the utility model is as follows:

A safety protection switch, comprising: a switch housing, an opening is arranged on the top of the switch housing, and shaft holes are arranged on both sides of the switch housing; a switching button, symmetrical And a rotating shaft corresponding to the shaft hole on the switch housing, so as to pivotally connect the switching button in the opening of the switch housing; two conductive metal sheets, the conductive metal sheets are arranged through the switch housing The bottom of the body extends outward; a double alloy sheet, one end of the double alloy sheet is fixedly connected and electrically connected to the one conductive metal sheet, and the other end is a non-fixed connection end, which is linked with the switch button to connect with the other conductive metal sheet. Contact or separation of metal pieces;

Further, the safety protection switch further includes an actuating reed located between the switching button and the bimetallic sheet; and the actuating reed is fixed on the switching button. ;

The actuating reed includes an abutment part, a fixed part and a movable contact part, and the abutment part, the fixed part and the movable contact part are integrally formed by an elastic sheet. ;

Corresponding to the abutting portion on the actuating reed, an abutment block is formed on the position corresponding to the abutting portion on the switch housing; corresponding to the fixed portion on the actuating reed, the switch A fixing groove is formed on the button, and the fixing part is inserted into the fixing groove. ;

The safety protection switch also includes a pull rod installed between the switch button and the double alloy sheet, one end of the pull rod is hinged to the switch button, and a hook is formed at the other end, and the hook is connected to the The non-fixed connection end of the double alloy sheet.

The double alloy sheet is linked to the switching button and is in contact with or separated from the conductive metal sheet to form a movable electrical connection terminal; corresponding to the movable electrical connection terminal on the double alloy sheet, the conductive metal sheet is also A fixed electrical connection terminal is formed.

The beneficial effect of the safety protection switch of the utility model is: it has the characteristics of simple structure, low cost, good protection effect, etc., and has the function of positioning switching button and free tripping without the influence of external force when the current is overloaded. Thereby greatly reducing the possibility of safety accidents and providing the protection performance of the switch.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the safety protection switch of the present utility model;

Fig. 2 is a three-dimensional structural schematic diagram of the actuating reed of the safety protection switch of the present invention;

Fig. 3 is a sectional view of the conduction state of the safety protection switch of the present invention;

Fig. 4 is a sectional view of the disconnected state of the safety protection switch of the present invention;

Fig. 5 is a sectional view of the safety protection switch of the present invention in a free tripping state affected by external force;

In the figure, 1. Switch housing, 2, 3. Conductive metal sheet, 4. Bimetallic sheet, 5. Actuating reed, 6. Pull rod, 7. Switching button, 11. Abutting block, 12 shaft hole, 31 .Fixed electrical connection terminal, 41. Movable electrical connection terminal, 51. Contact portion, 52. Fixed portion, 53. Movable contact portion, 61 Hook, 71. Rotating shaft, 72. Fixed slot.

Detailed ways

A safety protection switch as shown in Fig. 1 and Fig. 2 includes: a switch housing 1, an opening is arranged on the top of the switch housing 1, and shaft holes 12 are arranged on both sides of the switch housing 1; Switch button 7, the two sides of the switch button 7 are respectively provided with symmetrical rotating shafts 71 corresponding to the shaft holes 12 on the switch housing 1, so as to pivotally connect the switch button 7 to the switch housing 1 In the opening; two conductive metal sheets 2, 3, the conductive metal sheets 2, 3 are arranged through the bottom of the switch housing 1 and extend outward; a double alloy sheet 4, one end of the double alloy sheet 4 is fixedly connected and electrically Sexually connect the one conductive metal sheet 2, the other end is a non-fixed connection end, this end links the switch button 7 so as to contact or separate from the other conductive metal sheet 3;

Further, the safety protection switch also includes an actuation reed 5 between the switch button 7 and the double alloy sheet 4 ; and the actuation reed 5 is fixed on the switch button 7 .

Preferably, the actuating reed 5 includes an abutment portion 51, a fixed portion 52 and a movable contact portion 53, and the abutment portion 51, the fixed portion 52 and the movable contact portion 53 are formed by an elastic piece The material is integrally formed.

Preferably, corresponding to the abutment portion 51 on the actuating reed 5, an abutment block 11 is formed on the position corresponding to the abutment portion 51 on the switch housing 1; corresponding to the actuation The fixing portion 52 on the reed 5 is formed with a fixing groove 72 on the switching button 7 , and the fixing portion 52 is inserted into the fixing groove 72 .

Preferably, the safety protection switch further includes a pull rod 6 installed between the switch button 7 and the double alloy sheet 4, one end of the pull rod 6 is hinged to the switch button 7, and a hook is formed at the other end 61 , the hook 61 is engaged with the non-fixed connection end of the double alloy sheet 4 .

Preferably, the double alloy sheet 4 is linked to the switching button 7 and is in contact with or separated from the conductive metal sheet 3 to form a movable electrical connection terminal 41; A connection terminal 41 , a fixed electrical connection terminal 31 is also formed on the conductive metal sheet 3 .

Figure 3 is a cross-sectional view of the conduction state of the safety protection switch of the present invention. In the figure, the switch button 7 is affected by a pressure, and the abutment part 51 is simultaneously subjected to an external force to break through the resistance of the abutment block 11 and go downward. Simultaneously, due to the downward pressure of the actuating reed 5 , the double alloy sheet 4 contacts with the conductive metal sheet 3 to form an electrical connection.

Figure 4 is a sectional view of the off state of the safety protection switch of the present utility model. In the figure, the switch button 7 pulls up the pull rod 6 due to the effect of a reverse external force, thereby bringing the actuating reed 5 and the bimetallic strip 4 upward, to separate the bimetallic strip 4 from the conductive metal strip 3, and to place the abutting portion 51 on the abutting block 11, so as to position the switching button to prevent improper conduction.

As shown in Figure 5, it is the sectional view of the free tripping state of the safety protection switch of the present invention under the influence of external force. The movable contact portion 53 of the actuating reed 5 is deformed so as to achieve the purpose of free jumping.

The content disclosed in the utility model is one of the best embodiments, but any partial changes, changes, or modifications to the technical content disclosed in the utility model are derived from the technical ideas of the utility model and those who are familiar with the item Anything that is easy to infer without creative thinking by the skilled person does not depart from the scope of the patent right of the present utility model.

Claims (2)

1. safety protection switch comprises:

One switch case, the top of this switch case is provided with an opening;

One switches button, and this switching push button is articulated in the opening of described switch case;

Two conductive metal sheets, described conductive metal sheet run through and are arranged at described switch case bottom and extend to the outside;

The a pair of alloy sheet, described pairing gold plaque one end is fixedly connected and electrically connect a described conductive metal sheet, and the other end is the on-fixed link, described switching push button contacts with another conductive metal sheet or separates thereby this end links;

It is characterized in that,

This safety protection switch comprises that also one is in the movable contact spring of doing between described switching push button and the described pairing gold plaque; And describedly be fixed on the described switching push button as movable contact spring;

Describedly comprise an abutting part, a fixed part and a movable contact site, and described abutting part, fixed part and movable contact site are one-body molded by an elastic sheet material as movable contact spring;

Corresponding to the described abutting part of doing on the movable contact spring, be formed with a butt piece on the described switch case with on the corresponding position of abutting part;

Corresponding to the described fixed part of doing on the movable contact spring, be formed with a holddown groove on the described switching push button, described fixed part is inserted in the described holddown groove;

Described safety protection switch comprises that also one is installed on the pull bar between described switching push button and the described pairing gold plaque, and described pull bar one end is articulated in described switching push button, and the other end is formed with a grab, and described grab is connected in the on-fixed link of described pairing gold plaque.

2. safety protection switch according to claim 1 is characterized in that:

Described pairing gold plaque links on described switching push button and is formed with a movable electric connection terminal with conductive metal sheet contact or the end that separates;

Corresponding to the movable electric connection terminal on the described pairing gold plaque, also be formed with a fixing electric connection terminal on the described conductive metal sheet.

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