CN204464208U - Elastic tripping structure of the switch - Google Patents

Abstract

An elastic tripping structure of a switch is provided, wherein a shell is provided with at least a first conductive terminal and a second conductive terminal, a rotatable key is arranged above the shell, a protruding rod is arranged below one end of the key, and the protruding rod is movably connected with a connecting rod; one end of the second conductive terminal is fixedly and electrically connected with one end of an alloy conductive sheet, the other end of the alloy conductive sheet is a free end and is acted by an elastic element, and the elastic element is a roundabout and bent linear spring, so that the alloy conductive sheet can be positioned really when being tripped due to overheating.

Description

Elastic tripping structure of the switch

technical field

The utility model relates to a switch for a control circuit, in particular to a more reliable elastic tripping structure when an alloy conductive sheet automatically trips and powers off due to current overload.

Background technique

The operation of the power control switch is mainly to perform power-on (ON) and power-off (OFF) of the current loop. In addition to performing two functions of power-on (ON) and power-off (OFF), many current switch structures also have the function of automatically tripping and power-off when the current is overloaded and overheated, so as to prevent the fuse or breaker of the current circuit from not responding immediately when the current is overloaded. Risk of blackout or tripping.

There are too many patents on various existing power control switches, such as US Patent No. 5,262,748 applied by the applicant himself, and other US Patent Nos. 4,167,720, 4,937,548, 5,223,813, 5,451,729, and 5,558,211 ...the list goes on and on, all of which include the function of automatically tripping and powering off when the current overload circuit is overheated.

There is a switch structure with automatic tripping power-off function, which includes a housing, a first conductive terminal, a second conductive terminal and a third conductive terminal are arranged below the housing, the first conductive terminal and the second conductive terminal The two conductive terminals are respectively used to be electrically connected to the live wire and the water wire of the power supply, and the third conductive terminal is used to be electrically connected to the ground wire; wherein, the upper end of the first conductive terminal is provided with a protruding lower contact end; the second conductive terminal is used to electrically connect to the ground wire; The upper ends of the two conductive terminals are fixedly connected with a thermally deformable alloy conductive sheet, and a downwardly protruding upper contact end is arranged below the free end of the alloy conductive sheet. A button can also be pivotally arranged above the housing, a connecting rod is arranged below the first end of the button, and a hook portion is formed at the lower end of the connecting rod for hooking the free end of the aforementioned alloy conductive sheet. In addition, the free end of the alloy conductive sheet is also acted by an elastic element.

When the user presses down the first end of the button, the connecting rod moves down immediately to drive the upper contact end of the free end of the alloy conductive sheet to electrically contact with the lower contact end, and the upper contact end of the free end of the alloy conductive sheet In the process of moving to the lower contact end, the elastic element will be deformed until the upper contact end contacts the lower contact end, the deformation of the elastic element will return to the original shape and the alloy conductive sheet will be positioned; that is, the first conductive terminal conducts electricity through the alloy. The sheet and the second conductive terminal are electrically connected to form a current loop.

When the user presses down the second end of the button, the connecting rod at the first end moves up immediately and drives the free end of the alloy conductive sheet to move up, so that the upper contact end is separated from the lower contact end; When the upper contact end of the free end of the conductive sheet moves away from the lower contact end, the elastic element will also be deformed until the separation of the upper contact end and the lower contact end returns to the original position, and the deformation of the elastic element will return to its original shape. The alloy conductive sheet is positioned; that is, the first conductive terminal and the second conductive terminal are disconnected electrically so that a current loop cannot be formed.

When the current is overloaded and the temperature is overheated, the alloy conductive sheet will be deformed because it exceeds the predetermined temperature that can cause deformation. When the alloy conductive sheet is deformed, the free end of the alloy conductive sheet will be deformed and warped upward. The upper contact terminal is separated from the contact with the lower contact terminal to form a current break. Similarly, during the deformation process of the alloy conductive sheet, the elastic element will be deformed by the action of the alloy conductive sheet, until the separation of the upper contact end and the lower contact end returns to the original position, and the deformation of the elastic element returns to its original shape. The alloy conductive sheet is positioned by its elastic force.

Because the elastic element of the aforementioned existing switch is an arc-shaped linear spring, its elasticity is too soft, which affects the positioning accuracy of the free end of the alloy conductive sheet relative to the conductive terminal after it moves.

Utility model content

The purpose of this utility model is to solve the existing switch structure with automatic tripping and power-off function. The elastic element used to resist the alloy conductive sheet is too soft, so that it affects the free end of the alloy conductive sheet after moving relative to the conductive terminal. The problem of positioning certainty.

The feature of the utility model is to improve the structure of the elastic element used to resist the alloy conductive sheet, so that the elastic element has better flexibility without reducing the elastic strength, so that when the alloy conductive sheet is overheated and tripped Get a solid location.

Technical means of the present utility model comprises:

A housing with an inner space, at least a first conductive terminal and a second conductive terminal are provided under the housing, the upper end of the first conductive terminal has a lower contact end; a button is rotatably arranged on the housing Above, one end of the button is provided with a protruding rod, which is movably connected to a connecting rod; an alloy conductive sheet, one end of which is fixedly electrically connected to the second conductive terminal, and the opposite end is a free end connected to the connecting rod. Rod, the free end has an upper contact end corresponding to the lower contact end, and the free end is acted by an elastic element, the elastic element is a twisted and bent linear spring, the first end of the elastic element leans against the set In the positioning member of the housing, the opposite second end abuts against the free end of the alloy conductive sheet.

In order to make the alloy conductive sheet of the present invention resist against the elastic element stably, the free end of the alloy conductive sheet is provided with an upper protrusion and a lower protrusion, and a concave shape is formed between the upper protrusion and the lower protrusion the abutment part.

Based on the consideration of the convenience and economy of manufacture, the utility model is provided on the upper protrusion and the lower protrusion of the alloy conductive sheet by integral molding from the alloy conductive sheet.

In order to make the other end of the elastic element stably fit against the casing, the utility model provides a positioning element on the casing, and forms a recess against the positioning element at one end of the elastic element.

In one embodiment, the utility model can use a screw as the positioning element, and the screw forms a concave ring groove that can be fitted with the concave portion.

The utility model is suitable for a switch further provided with a third conductive terminal under the casing.

Description of drawings

Fig. 1 is a three-dimensional schematic view showing the appearance structure of the switch of the present invention;

Fig. 2 is the three-dimensional exploded view showing the combination relationship of the main components of the switch of the present invention;

Fig. 3 is a schematic plan view of an embodiment showing the current breaking state of the switch structure of the present invention after tripping; and

FIG. 4 is a schematic plan view of an embodiment of the switch structure of the present invention in a state of a current path.

Wherein, the reference signs are explained as follows:

1 shell

10 space

11 cover

2 buttons

21 protruding rod

22 connecting rod

221 extension column

222 Groove

3A first conductive terminal

3A1 Lower contact terminal

3B Second conductive terminal

3C The third conductive terminal

4 alloy conductive sheet

41 Upper contact end

42 abutment part

421 Upper protrusion

422 Lower protrusion

5 Elastic elements

51 first end

52 second end

53 concave

6 Positioning elements

61 concave ring groove

Detailed ways

The implementation of the present utility model will be described in more detail below in conjunction with the drawings and reference numerals, so that those skilled in the art can implement it after studying this specification.

As shown in Figures 1 to 3, the preferred embodiment of the switch structure provided by the present invention includes a housing 1 with an inner space, and at least a first conductive terminal 3A and a first conductive terminal 3A are fixedly arranged below the housing 1. Two conductive terminals 3B, and even a third conductive terminal 3C can be provided. The first conductive terminal 3A and the second conductive terminal 3B are respectively used to electrically connect to the live line and the water line of the power supply, and the third conductive terminal 3C is used for Electrically connected to the ground wire; wherein, the upper end of the first conductive terminal 3A is provided with a lower contact end 3A1 protruding upward.

The upper end of the second conductive terminal 3B is fixedly connected to a heat-deformable alloy conductive sheet 4, and the free end of the alloy conductive sheet 4 is formed with an upper protrusion 421 and a bifurcated upper protrusion 421 which are mutually staggered and bifurcated by integral stamping and forming technology. The lower protrusion 422 forms a recessed abutting portion 42 between the upper protrusion 421 and the lower protrusion 422 ; an upper contact terminal 41 is formed below the free end of the alloy conductive sheet 4 .

The roughly middle position of a button 2 is pivotally arranged above the casing 1 with a pivot, so that the button 2 can rotate relative to the casing 1 like a seesaw; The length of the protruding rod 21, the lower end of the protruding rod 21 is further movably connected to a connecting rod 22, and the lower end of the connecting rod 22 is used to movably connect the position near the free end of the alloy conductive sheet 4; in detail, the connecting rod 22 is formed with a plate-shaped body, an extension column 221 is formed on one side at the upper end of the plate-shaped body, and a groove 222 is formed on the same side at the lower end (as shown in Figure 2 ), by this structure, the extension The column 221 passes through the perforation near the lower end of the protruding rod 21 , and the groove 222 allows one side of the alloy conductive sheet 4 to slide and fit, so as to complete the connection between the connecting rod 22 and the alloy conductive sheet 4 .

The utility model arranges an elastic element 5 inside the housing 1, and makes one end of the elastic element 5 act on the free end of the alloy conductive sheet 4. In detail, the elastic element 5 is integrally formed into a plurality of back and forth curved shapes by means of a spring wire, and has opposite first ends 51 and second ends 52, wherein the first end 51 forms a recess 53 (such as The concave portion 53 shown in the figure is V-shaped).

Inside the housing 1, a positioning element 6 for positioning the first end 51 of the elastic element 5 is locked. For example, the utility model adopts a screw as the positioning element, and a concave ring groove is formed at the appropriate position of the positioning element 6. 61; when the positioning element 6 and the alloy conductive sheet 4 are installed in the housing 1, the concave portion 53 of the first end of the elastic element 5 is pressed against the concave ring groove 61 of the positioning element 6, and the opposite second end 52 leans against the abutting portion 42 of the free end of the alloy conductive sheet 4, and the second end 52 and the free end of the alloy conductive sheet 4 can be prevented from detaching from the restriction of the second end 52 by the upper protrusion 421 and the lower protrusion 422 , so the free end of the alloy conductive sheet 4 is subjected to an elastic force by the elastic element 5 .

With the above-mentioned switch structure of the present invention, when the user presses the first end of the key 2 downward, the protruding rod 21 moves down immediately to drive the connecting rod 22, and the connecting rod 22 drives the free end of the alloy conductive sheet 4. The upper contact end 41 is in electrical contact with the lower contact end 3A1 provided on the first conductive terminal 3A; that is, the first conductive terminal 3A is electrically connected through the alloy conductive sheet 4 and the second conductive terminal 3B to form a current loop (as shown in FIG. 4); in this case, the free end of the alloy conductive sheet 4 is subjected to the elastic force of the elastic element 5, so that the alloy conductive sheet 4 can be stably maintained in the electrically connected state.

When the user presses the second end of the button 2 downward, the protruding rod 21 at the first end moves up immediately and drives the connecting rod 22 to move upward, so that the connecting rod 22 drives the free end of the alloy conductive sheet 4 to move upward. move up, and then separate the upper contact end 41 from the lower contact end 3A1; in the process that the connecting rod 22 drives the alloy conductive sheet 4 to move upward, the elastic element 5 will be pushed and compressed by the swinging alloy conductive sheet 4 until the alloy conducts electricity. After the free end of the sheet 4 crosses the maximum compression position of the elastic element 5, the elastic element 5 rebounds again so that the alloy conductive sheet 4 remains in a stable spring-off position; Sexual connection and unable to form a current loop (as shown in Figure 3).

Also as shown in Figure 3, when the current overload causes the temperature to be overheated, the alloy conductive sheet 4 will be deformed because it exceeds the predetermined temperature that can cause deformation. When the alloy conductive sheet 4 is deformed, the alloy conductive sheet 4 can be deformed immediately. When the deformation reaches a critical point, the upper contact end 41 breaks away from the contact with the lower contact end 3A1 to form a current break; in the process of the alloy conductive sheet 4 deforming and moving upward, the elastic element 5 will be subjected to the swinging alloy conductive sheet 4 is pushed and compressed until the free end of the alloy conductive sheet 4 crosses the maximum compression position of the elastic element 5, and the elastic element 5 rebounds again so that the alloy conductive sheet 4 remains in a stable pop-off power-off position.

The above descriptions are only preferred embodiments for explaining the utility model, and are not intended to limit the utility model in any form. Changes should still be included in the scope of protection intended by the utility model.

Claims (6)

1. An elastic tripping structure of a switch, comprising: A housing with an inner space, at least a first conductive terminal and a second conductive terminal are provided on the lower side of the housing, and the upper end of the first conductive terminal has a lower contact end; A button is rotatably arranged above the casing, and a protruding rod is provided below one end of the button, and the protruding rod is movably connected to a connecting rod; An alloy conductive sheet, one end of which is fixedly electrically connected to the second conductive terminal, and the opposite end is a free end connected to the connecting rod, the free end has a pair of upper contact ends corresponding to the lower contact end, and the free end is received by a The function of the elastic element is characterized in that: The elastic element is a meandering and bent linear spring. The first end of the elastic element abuts against the positioning element provided on the casing, and the opposite second end abuts against the free end of the alloy conductive sheet. 2. The elastic tripping structure of the switch according to claim 1, wherein the free end of the alloy conductive sheet is provided with an upper protrusion and a lower protrusion, and a gap is formed between the upper protrusion and the lower protrusion. A concave shaped abutment. 3 . The elastic tripping structure of the switch according to claim 2 , wherein the upper protrusion and the lower protrusion are integrally formed from the alloy conductive sheet. 4 . 4. The elastic tripping structure of the switch according to claim 1, wherein the first end of the elastic element forms a concave portion for abutting against the positioning element. 5 . The elastic tripping structure of the switch according to claim 4 , wherein the positioning element is a screw, and the screw forms a concave ring groove that can fit into the concave portion. 6 . 6 . The elastic tripping structure of the switch according to claim 1 , wherein a third conductive terminal is further provided under the housing. 6 .