CN1206681C - switchgear - Google Patents

Abstract

The present invention relates to a switch device, which is a power switch device composed of a button, a switch box, a positioning element, and a swing contact. When a button is pressed, the annular ladder provided on the button and the positioning rod provided on the positioning element are linked to produce a circular positioning relationship. When the button is positioned downward or upward, the bottom of the button pushes or releases the swing contact, so that the second contact of the swing contact contacts or separates from the first contact, forming a circuit loop on or off state.

Description

switchgear

The invention belongs to the field of electrical appliances, and in particular refers to a switch device which can be used to generate a positioning relationship by pressing a key to make the ring-shaped ladder set by the key and the positioning rod set by the positioning element linked to each other.

The operation of the power switch mainly lies in the two action strokes of power on (ON) and power off (OFF). Therefore, the linkage relationship between the switch button and the conductive contact member is the key to the quality and service life of the switch. In order to effectively implement the interlocking action of the internal components of the switch, simplify the switch components, and avoid the breakage and damage of the elastic components or the poor contact of the elastic fatigue caused by repeated pressing of the switch, or to further prevent unstable power supply and excessive load of electrical appliances Many current overloads lead to overheating of the circuit, fire hazards caused by wires, and the improvement of the switch structure has become a common topic for manufacturers.

Therefore, for the switch manufacturer, under the basic premise of effectively performing the switch action, if the breakage of the elastic component or the poor contact of the elastic fatigue caused by repeated pressing of the switch can be avoided, the quality of use of the switch will be relatively improved. and service life, both manufacturers and consumers can benefit from it. There are too many patents on the switch structure, such as US Patent No. 4167720, No. 4937548, No. 5223813, No. 5451729, No. 5558211, etc. There are too many to enumerate, but those patents have common shortcomings, namely:

(1) There are many components, and the interlocking stroke is complicated, which increases the manufacturing cost and also increases the chance of switch failure due to the large number of components.

(2) Use buttons (buttons) to directly or indirectly press the elastic contact piece to form power on or off. The elastic contact piece is bent repeatedly and bears the thermal expansion and contraction strain caused by the current path at the same time, which will cause poor contact or fracture. damage, reduce the quality of electricity and shorten the service life.

As shown in Figures 1 to 3, in the structure disclosed in U.S. Patent No. 5,223,813, after the button is pressed, the connecting rod below the button is first linked, and the up and down swing components connected by the connecting rod are pressed or released. The elastic contact piece makes the upper contact contact or jump off the lower contact to conduct or cut off the circuit; it uses the ammonium button to press or release the elastic contact piece indirectly, and there should be no operational problems under ideal conditions. However, the obvious disadvantages of its complex components, high operating costs, increased operating failures, slow response of the linkage stroke, and potential fracture or elastic fatigue of the elastic contact piece still exist, which has become a common problem for manufacturers and users, so further improvement is needed.

The object of the present invention is to propose a switch device composed of a button, a switch housing, a positioning element and a swing contact, and its button directly pushes or releases the swing contact to make the circuit conduct or cut off, so it improves the product quality. At the same time, it has the advantages of simple structure, easy assembly and reduced operation failure, thus solving the problems existing in the prior art.

The technical solution adopted by the present invention is: it is a power switch device composed of a button, a switch box body, a positioning element, and a swing contact, and is characterized in that:

The button has a groove below it, and the groove is used for assembling an elastic element. One side of the groove is concavely provided with a ring-shaped ladder, and a polygonal convex part is protruded in the ring-shaped ladder. The button is also provided with a push button. top;

The switch box body is a hollow shell with a side opening, and an opening at the top, which is used for assembling the aforementioned buttons. The first and second contact terminals are respectively plugged into the switch box body, and the second contact A connecting swing contact is placed above the terminal, and the swing contact swings around the second contact terminal as the axis;

The positioning element is provided with a positioning rod, and the positioning rod extends into the circular ladder of the button, and the positioning element can reciprocate laterally relative to the switch box body;

The swing contact piece is assembled above the second contact terminal and can swing around the second contact terminal as a central axis, and is combined with a second contact;

By pressing the button, the ring-shaped ladder on the side below the button and the positioning rod are cyclically positioned. When the button is positioned downward or upward, the bottom of the button pushes or loosens the swing contact, so that the second contact of the swing contact Contact or leave the first contact to form a circuit loop conduction or disconnection state.

The feature of the present invention is that when the button is positioned downward or upward, the bottom of the button pushes or loosens the swing contact, so that the second contact of the swing contact contacts or separates the first contact, forming a circuit circuit conduction or disconnection state;

The present invention simplifies and improves the switch device, directly pushes or releases a swing contact with a button to energize or disconnect the circuit, replaces the elastic contact, has no defects of fracture or elastic fatigue, and can improve the quality of use and service life; The structure is formed to achieve the specific effects of easy overall assembly, lower manufacturing cost, and at the same time reduce operational failures.

Fig. 1 is a three-dimensional exploded view of the prior art.

Fig. 2 is a cross-sectional view of the prior art, which shows the state of the switch being de-energized (OFF).

FIG. 3 is a cross-sectional view of the prior art, which shows the state of the switch being energized (ON).

Fig. 4 is an exploded perspective view of Embodiment 1 of the present invention.

Fig. 5 is a perspective view of a key according to an embodiment of the present invention.

FIG. 6 is a cross-sectional view of a combination of Embodiment 1 of the present invention, which shows the situation of circuit disconnection (OFF) of Embodiment 1 of the present invention.

FIG. 7 is a cross-sectional view of a combination of Embodiment 1 of the present invention, which shows the situation that the circuit of Embodiment 1 of the present invention is energized (ON).

Fig. 8 is an embodiment of the present invention, which shows the relative positions of the ring-shaped ladder of the key and the positioning rod when the key is pressed and released.

Fig. 9 is an exploded perspective view of Embodiment 2 of the present invention.

FIG. 10 is a cross-sectional view of the combination of the second embodiment of the present invention, which shows the situation of the second embodiment of the present invention, when the current is overloaded, the metal plate is tripped and the power is cut off (OFF).

Now further illustrate preferred specific embodiments of the present invention in conjunction with above-mentioned each accompanying drawing.

As shown in Fig. 4 to Fig. 6, a kind of switchgear improvement of the present invention, it comprises:

A button 1 has a groove 11 below it, and the groove 11 is used for assembling an elastic element 14. In this embodiment, it is a compression spring, which provides the upward elastic force of the button 1. One side of the groove 11 is concavely provided with polygonal A circular stairway 12 with a polygonal convex part 121 protruding in the middle of the circular stairway 12;

A switch box body 2 is a hollow shell with side openings, with an opening 21 at the top, and a buckling groove 211 and a positioning recess 212 inside. The opening 21 is used for assembling the aforementioned button 1. The bottom surface of the switch box body 2 is provided with a first slot 22 and a second slot 23 for inserting the first and second contact terminals 24 and 25 respectively. The top of the second contact terminal 25 is a plate-shaped body, and a concave groove 251 is formed on the plate-shaped body, and more than one positioning groove 252 is arranged in the concave groove 251; the inner side wall of the switch box body 2 is provided with a through hole 26 1. More than one (including) protruding rod 27, and several combining holes 29 are respectively provided around the switch box body 2.

A cover body 20, the cover body 20 is provided with several combination holes 201 corresponding to the combination hole 29 of the switch box body 2, and is combined with the switch box body 2 with a combination piece 202. In this embodiment, the combination piece 202 is a rivet .

A positioning element 4, the positioning element 4 is slightly shaped into a strip, combined with a positioning portion 40; one end of the positioning portion 40 is bent into a positioning rod 41, and the positioning rod 41 passes through the positioning rod hole 411 provided by the positioning element 4 And extend into the aforementioned annular staircase 12, the lower end of the positioning part 40 is bent and combined in the perforation 26 of the switch box body 2, and an elastic fastener 45 is assembled on the outside of it, and one end of the elastic fastener 45 is fixed on the switch. The fastening groove 211 of the box body 2 provides the elastic force for the positioning rod 41 to abut against the annular staircase 12; the positioning element 4 is respectively provided with a corresponding convex rod at a position relative to the convex rod 27 of the switch box body 2 Holes 42, 43, the protruding rod holes 42, 43 are elongated holes for the protruding rod 27 to pass through and can move relative to each other repeatedly in a transverse direction.

A swing contact piece 5, the swing contact piece 5 is a bent sheet body, and the two ends below the sheet body are respectively provided with positioning protrusions 51, which correspond to the grooves 251 and the positioning recesses placed above the second contact terminal 25. Slot 252, so that the swing contact 5 can swing freely in the groove 251 without displacement; both sides of the middle section of the swing contact 5 are provided with a combination recess 52, and a perforation 53 is provided above, and the perforation 53 is combined with the second contact 54, and the swing contact The piece 5 is further combined with an elastic element 55, which is formed into a curved arc shape, and is joined to the joint recess 52 with more than one buckle pin 551 extended, and one end of the elastic element 55 is buckled to the positioning recess 212 of the switch box body 2 , and provide the swing contact piece 5 with an elastic restoring force, that is, an elastic force tending to be vertical.

At first, as shown in Figure 6, it is the sectional view of a combination of the embodiment of the present invention, and it shows the closed (OFF) situation of the embodiment of the present invention; At this moment, the button 1 is upwardly supported by the elastic force of the elastic element (compression spring) 14, The lower end surface of the push top 13 below the ammonium key 1 is only slightly in contact with the curved surface of the elastic element 55, so the swing contact 5 is not pushed, and the elastic force of the elastic element 55 pushes against the positioning recess on the upper wall of the switch box body 2 212 , keeping the swing contact 5 in a nearly vertical state as a whole, the second contact 55 is separated from the first contact 242 , and the circuit loop is in an OFF state.

As shown in FIG. 8( a ), in the general circuit disconnection (OFF) state, the positioning rod 41 of the positioning element 4 is located at the lower end of the annular staircase 12 of the button 1 .

The present invention changes from the circuit disconnection (OFF) state to the conduction (ON) state. Please refer to FIG. The elastic force of upward recovery, the original positioning rod 41 is located at the bottom of the ring-shaped staircase 12, that is, the circuit breaker (OFF) position, as shown in Figure 8 (a), because of the more prominent restriction on the left side, the positioning rod 41 (counterclockwise) direction) along the ring-shaped staircase 12 to move relatively to the upper right corner, as shown in Figure 8(b), the user releases the button 1, and the button 1 is bounced upward by the return elastic force of the elastic element (compression spring) 14 as a whole, and the positioning rod 41 (in the counterclockwise direction) along the path of the circular staircase 12 to reach the apex of the polygonal convex portion 121 is the circuit conduction (ON) position, as shown in FIG. 8( c ).

Referring to Fig. 7 at the same time, it is a sectional view of a combination of an embodiment of the present invention, the lower end surface of the push top 13 of the button 1 pushes down the curved surface of the elastic element 55, so that the positioning concave portion 212 at the upper end is centered counterclockwise (to the left) ) rotation displacement and push the swing contact 5 to the right, the swing contact 5 is centered on the concave groove 251 below it, and swings clockwise (to the right), so that the second contact 55 and the first joint of the metal sheet 3 The contacts 34 are in contact. At this time, the circuit loop reaches the second contact terminal 25 from the first contact terminal 24, through the first contact point 242, the second contact point 54, and the swing contact 5, forming the state of the circuit loop conduction (ON), and The arc of the elastic member 55 is pushed and stretched to accumulate elastic force to restore the original shape.

The present invention is from the circuit conduction (ON) state to the circuit breaker (OFF) state, as shown in Figure 8, when the user presses the ammonium key 1, the elastic element 14 (compression spring) located in the groove 11 is compressed and accumulates The elastic force of upward recovery is located at the positioning rod 41 at the apex of the polygonal convex part 121 inside the annular stairway 12, as shown in Figure 8 (c). Due to the limitation of the protrusion on the right side, the positioning rod 41 (according to the counterclockwise direction) The annular staircase 12 is relatively displaced to the upper left corner, as shown in Figure 8(d), the user releases the button 1, and the button 1 as a whole is bounced upward by the restoring force of the elastic element (compression spring) 14, and the positioning rod 41 (reversely clockwise direction) along the path of the ring-shaped staircase 12 back to the bottom, and become the state of circuit disconnection (OFF), as shown in Figure 8 (a).

Simultaneously, the push top 13 of the button 1 rises upwards and returns to the lower end surface of the push top 13 from the state of the push elastic element 55 and the swing contact 5 (as shown in FIG. 7 ) and only touches the circle of the elastic element 55 slightly. Arc surface, as shown in Figure 6, at the same time, the elastic element 55 loses the thrust pushing the top 13, and its stretched and deformed circular arc returns to its original shape by its own elastic restoring force and will be connected to the swing contact piece 5 below and the concave hole below it. The groove 251 is the central axis and swings in the counterclockwise direction (to the left), so that the second contact 54 is separated from the first contact 242 to form an OFF state of the circuit loop.

The above is the case of the first embodiment of the present invention when pressing the key 1 to turn the switch on (ON) or off (OFF).

The present invention can also be applied to the state of automatic tripping and power-off when the current is overloaded, as shown in Figure 9, which is a three-dimensional exploded view of Embodiment 2 of the present invention; where the top of the first contact terminal 24 is combined with a metal sheet 3. Two legs 31 and an elastic piece 32 are respectively formed on both sides of the metal sheet 3 , the elastic piece 32 is provided with a perforation 33 , and the perforation 33 is combined with a first contact 34 . In addition, a blocking rod 28 is provided on the inner wall of the switch box body 2, as shown in FIG. 10 .

When the current is overloaded, as shown in Figure 10, the metal sheet 3 is heated and strained, and its upper end is deformed and displaced to the left, so that the extended elastic piece 32 jumps off to the right, and the first contact 34 also Jump to the right and separate from the second contact 54, forming the state of circuit breaker (OFF); in addition, the retaining rod 28 set on the switch box body 2 is then against the shrapnel 32 that jumps to the right to prevent excessive jumping. Take off, and negatively give the relative push-off fulcrum in the process of cooling back to the original state of metal sheet 3, and the elastic force jumps back to the left at the lower end of the shrapnel 32 smoothly.

The present invention has been described in detail above, but what is described above is only a preferred embodiment of the present invention, and should not limit the implementation scope of the present invention. That is, all equivalent changes and modifications made according to the scope of the claims of the present invention shall still fall within the protection scope of the claims of the present invention.

Claims (14)

1, a kind of switching device, it be is characterized in that by a button, a switch box body, a setting element, a swing power switch device that contact constituted:

This button, a groove is established in its below, and this groove is for assembling one flexible member, and a side of groove is concaved with the ring-type ladder access, is convexly equipped with a polygonal protuberance in this ring-type ladder access, and button is provided with an ejection part in addition;

This switch box body, it is the hollow housing of a tool side openings shape, there is an opening on its top, this opening is for the aforesaid button of assembling, at switch box body first, second contact terminal of pegging graft respectively, second contact terminal top is put and is connected the swing contact, and this swing contact is an axis swing with second contact terminal;

This setting element, its group is provided with a positioning rod, and this backstay stretches in the annular ladder access of button, and setting element is this switch box body traverse motion relatively;

This swings contact, and it is assembled in second contact terminal top and can second contact terminal is that central shaft is swung, and is combined with second contact on it.

2, a kind of switching device as claimed in claim 1 is characterized in that, set flexible member is a compression spring in the groove of described button.

3, a kind of switching device as claimed in claim 1 is characterized in that, the set ejection part in the below of described button is plates.

4, a kind of switching device as claimed in claim 1 is characterized in that, described switch box body offers first slot and second slot of planting for first contact terminal, second contact terminal.

5, a kind of switching device as claimed in claim 1 is characterized in that, the internal side wall of described switch box body is provided with one or more nose bar, and this setting element is provided with the nose bar hole with respect to nose bar.

6, a kind of switching device as claimed in claim 5 is characterized in that, the nose bar hole of described setting element is an elongated hole, can be relative with nose bar becomes traverse motion.

7, a kind of switching device as claimed in claim 1 is characterized in that, the top of described second contact terminal is formed with a groove for swing contact storing connection.

8, a kind of switching device as claimed in claim 1 is characterized in that, the top of described second contact terminal is formed with a chase, wherein offers detent, and this swing contact below is formed with the locating convex block corresponding to detent.

9, a kind of switching device as claimed in claim 1 is characterized in that, described swing contact combination has a flexible member, and this flexible member one end group is located at the switch box body.

10, a kind of switching device as claimed in claim 9 is characterized in that, described flexible member forms the curved arc shape, and extends more than one snapping pin, and the swing contact is concaved with more than one in conjunction with recess, and this snapping pin is incorporated in conjunction with recess.

11, a kind of switching device as claimed in claim 1 is characterized in that, described setting element combination has a spring secures rail to sleeper.

12, a kind of switching device as claimed in claim 1 is characterized in that, perforation is offered in the top of described swing contact, and perforation is in conjunction with one second contact.

13, a kind of switching device as claimed in claim 1 is characterized in that, the top of described first contact terminal is combined with an alloy piece, and this alloy piece is formed with two legs and a shell fragment, and is combined with first contact.

14, a kind of switching device as claimed in claim 1 is characterized in that, the internal side wall of described switch box body is provided with a pin, and this pin provides the shell fragment of replacing alloy piece.

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