CN2298600Y - Hand switch protector - Google Patents

Abstract

The utility model relates to a manual switch protector, which comprises a draw rod pivoted in a main body, a bearing seat arranged on one side of the draw rod, a spring abutted between the bearing and the main body, a break guide vane extended and arranged on the other side of the draw rod, an elastic sheet with bending curvature, and a juncture arranged on one end of the elastic sheet. A rebound point is formed on the prearrangement position of the elastic sheet because of the downward concave. A contact button is arranged on a position adjacent to the rebound point and the contact bottom is opposite to a contact sheet. A bimetallic strip is arranged on the utility model. A pivot point is arranged on one end of the bimetallic strip, and the juncture of the elastic sheet is pivoted on a contact sheet. So the break guide vane of the draw rod is opposite to the middle part between the contact button and the contact sheet.

Description

The hand switch protector

The utility model relates to a kind of hand switch protective device, specifically a kind of hand switch overload protective device.

See also shown in Figure 1ly, it is a structural representation of commonly using the hand switch protector; The top of this main body 1 is embedded with a button 2, is equipped with a driving chip 3 in a bottom portion of button 2, establishes a bimetal leaf 4, one end below is provided with a contact point 5, connect simultaneously and with this driving chip 3 and to establish, produce interactive relationship with this driving chip 3 in view of the above, and then driven by this button 2 indirectly; There have a circuit board to connect in addition in addition to establish two contact chips 6, contact chip 6 end faces of one of them to have a contact point 7 in addition to be relative with the contact point 5 of this bimetal leaf 4; The 3rd contact chip 6 of whole hand switch then is embedded in the bottom of this main body 1, so that establish with another termination of this bimetal leaf 4.

In view of the above when switch normally uses, button 2 is pressed toward connecting (ON) end, make this driving chip 3 stretch downwards, and then driving bimetal leaf 4 bends downwards, make the set contact point 5 in bottom contact, make 6 one-tenth conducting states of three contact chips in view of the above with contact point 7 on the contact chip 6; In case switch presents the abnormal overload phenomenon; the temperature of total body rises; and bimetal leaf 4 is because of the characteristic of its material character; will upwards become folding because of variations in temperature causes bimetal leaf 4; break away from contact condition in view of the above with contact chip 6; switch is not on-state when the time comes, further protects the influence that electrical equipment do not transshipped and damages.Whole switch is until temperature is recovered just often, and this bimetal leaf 4 recovers normal shape and just recovers normal use.

By above-mentioned known structure as can be known: this bimetal leaf is played the part of a considerable role in the whole hand switch, on the one hand must when general normal uses, serve as the conducting sheet and use, on the other hand then when overload when thermometric sheet and the use of outage sheet; As everyone knows, this bimetal leaf is the metal of the quite special pearl of character, and the torsional deformation characteristic that causes when utilizing variations in temperature causes the effect of special use, and in the known structure, serve as the normally sheet with bimetal leaf and constantly bend up and down, under the high frequency of utilization like this, be easy to generate elastic fatigue and cause loose contact when using to contact this contact chip, and can't bounce under the overload, losing the usefulness of protection electrical equipment, cause functional lability, is a big shortcoming really; Therefore in the whole design, this bimetal leaf also is not suitable for when the usefulness that contacts the conducting sheet.

The fine setting of the contact condition of this bimetal leaf is to establish to being controlled at the shell fragment 8 of this main body one side in addition, this shell fragment 8 is that the mode with the single-point locating shaft is positioned on the plastic cement shell, so, metal is located and will be born out with minimum the contacting of plastic cement, swing about during the pass, its stability is bad certainly, relatively, interlock influences the stability of bimetal leaf function again, therefore, have to append one on its structure and adjust screw 9 at the place, location of shell fragment 8, yet, this adjusts 9 on screw and with point between the screw front end shell fragment 7 is done the adjustment of present stage, after to be adjusted the getting well, loosening for avoiding adjusting screw 9, shut with fixing glue again.Yet after overall structure is fixing, this hand switch overload protective device as after manual open and close for several times, when function loses again, can't be adjusted again, and this is again another significant drawback.

Main purpose of the present utility model provides a kind of hand switch overload protective device, and it reaches with special structure and does not utilize bimetal leaf can work as the switch normal operation, and reaching not only can provide the circuit overloads protection but also can improve the stability that switch uses.

The utility model switch overload protective device has a main body, is set as the accommodation space of hollow in this main body, and makes a button can be chimeric go into the top of this accommodation space, is embedded with three independently contacts separately in addition in this accommodation space bottom, is characterized in:

If a pull bar, this pull bar one side is set as a bearing, and establishes a spring and be held between this bearing and main body; This pull bar top also has a pivoting point, then direct and this main body pivot joint at the opposite side of the relative bearing of pull bar, and it is prominent upright to side to be provided with a disconnected guide card;

An if shell fragment, its shape is to present two ends to have the bending curvature, wherein the predeterminated position of this shell fragment is recessed to form a bounce-back point downwards, and it is relative with a contact chip that is positioned at the main body stage casing that contiguous this bounce-back point is then established a contact button, and the while also makes this disconnected guide card also with respect between the two; One end of shell fragment then is provided with a junction point, and the other end then is provided with a V-type groove;

If a bimetal leaf is established a pivot chalaza with the one end, the junction point that articulates this shell fragment simultaneously is on a contact chip, and it is corresponding with contact point that the other end of this bimetal leaf can stretch into this shell fragment bottom;

This button is chimeric goes into behind the accommodation space is to become the pivot joint state with main body, and joins in the pivoting point that the bottom of button predeterminated position is established one group of pivot button and this pull bar; It is interactive according to above-mentioned structure this sheet metal to be started between shell fragment and each structure, forms the effect of overload protective device.

The utility model has the advantages that: overcome existing hand switch owing to the various shortcoming that the bimetal leaf application of force is frequently made its distortion caused; it can directly not formed via bimetal leaf drive the protection loop, thereby improved useful life of the present utility model.

Description of drawings of the present utility model is as follows:

Fig. 1 is a schematic perspective view of commonly using hand switch.

Fig. 2 is an action schematic diagram of commonly using device.

Fig. 3 is a perspective exploded view of the present utility model.

Fig. 4 is that the utility model is worked as the action schematic diagram of switch when using.

Fig. 5 is the action schematic diagram of the utility model when voltage overload.

Fig. 6 is the utility model another generalized section in voltage overload.

The drawing explanation:

1,10-main body, 2, the 30-button, 3-driving chip, 4, the 50-bimetal leaf, 5,7-contact point, 6,70,71, the 72-contact chip, 8, the 60-shell fragment, 9-adjusts screw, 31-pivot button, 40-pull bar, the 41-bearing, 42-spring, 43-pivoting point, the 44-guide card that breaks, 51-pivot chalaza, the 61-point that rebounds, the 62-contact button, 63-junction point, 64-V type groove.

Provide one of the utility model embodiment preferably according to Fig. 3～Fig. 6 below, and, further provide ins and outs of the present utility model in conjunction with description to this embodiment.

See also shown in Fig. 3,4, the utility model is a kind of hand switch overload protective device, and it has a main body 10, and system is the accommodation space of a hollow in this main body 10, so that ccontaining all structures are in interior.And establish a button 30, be provided with one group of pivot button 31 in its bottom, and whole button 30 is embedded into this accommodation space top; In addition in this accommodation space bottom equidistantly to separate the contact chip 70,71,72 that three separation are not installed.

If a pull bar 40, its center are pivoted with main body 10 and combine, a side of this pull bar 40 then is provided with a bearing 41, a spring 42 is set in view of the above is placed in bearing 41 and becomes one to support state with 10 of main bodys; These pull bar 40 tops are provided with a pivoting point 43, and make this pivoting point 43 stretch into these button 30 places to be connected in series with this group pivot button 31, to make whole pull bar 40 be done upper and lower running by these button 30 interlocks; It is laterally prominent upright that the opposite side of these pull bar 40 relative bearings 41 then is provided with a disconnected guide card 44.

An if shell fragment 60, its shape is the characteristic that two ends bend up concavity, wherein, form bounce-back point 61 in this shell fragment recess bottom, contiguous these bounce-back point 61 places then are provided with a contact button 62, so that corresponding, make contact chip 71 and contact button 62 both opposite positions simultaneously just in the face of the set disconnected guide card 44 of this pull bar 40 with a contact chip 71 that is positioned at main body 10 stage casings; End at this shell fragment then is provided with a junction point 63 in addition, and its other end then is provided with a V-type groove 64, so that contact with another contact chip 72.

If a bimetal leaf 50, one end are provided with a pivot chalaza 51, the junction point 63 that will articulate shell fragment 60 in view of the above simultaneously is integral on a contact chip 70.It is corresponding with its contact point that has 62 that the other end of this bimetal leaf 50 can stretch into these shell fragment 60 bottoms thus.

According to said structure, under the general normal switch user mode of the utility model conduct, this switch becomes to open (ON) state, this moment shell fragment 60 contact point 62 downwards mortgage with its relative contact chip 71 contact, the V-type groove 64 of other end institute tool then contacts with another contact chip 72, presents a conducting state in view of the above; And this moment, this pull bar 40 was downward-sloping shape because of button 30 interlock that is pressed, should just in time be butted on outside the interface of this contact chip 71 and contact button 62 by disconnected guide card 44 thus, by the space configuration of said structure, make switch act temporarily as osculating element and do conducting state by the structure of this shell fragment 60.

In case electrical equipment presents overload, therefore temperature raises, the bimetal leaf 50 that is positioned at shell fragment 60 belows will be bent upwards because of variation of temperature causes body, so upward curved action will be taken advantage of a situation to upspring and oppress the bounce-back point 61 of its opposite face of position, make whole shell fragment 60 therefore upwards kick up, further make this contact button 62 no longer be the gesture that offsets and close with contact chip 71, the disconnected guide card 44 of this pull bar 40 will be because of bearing 41 thus, the elastic force of spring 42 is taken advantage of a situation and is forced in 71 of contact button 62 and contact chips, blocked the conducting state of 71 of this contact button 62 and contact chips in view of the above, further, insertion that should disconnected guide card 44 breaks away from and the contacting of another contact chip 72 because of making V-type groove 64, therefore whole hand switch will become off-position, prevent to cause because of circuit overloads the damage of electrical equipment.

The above-mentioned structure of mat makes bimetal leaf no longer have the dual-purpose shortcoming of a slice, but replace the contact onunit with this shell fragment, the function of both alternative bimetal leaf in known structure like this, also can when transshipping, circuit abnormality drive the whole switch of this shell fragment indirect block with bimetal leaf, form function and independently operate impregnable each other effect.

In sum, the utility model is a kind of hand switch overload protective device, and it reaches the growth of function independence and useful life with special tectonic.The effect that stability is high.

Claims (1)

1. a hand switch protector comprises a main body, is set as the accommodation space of hollow in this main body, and makes a button can be chimeric go into the top of this accommodation space, in addition, is embedded with three contact chips independently separately in this accommodation space bottom, it is characterized in that:

If a pull bar, this pull bar one side is set as a bearing, and establishes a spring and be held between this bearing and main body; This pull bar top also has a pivoting point, then direct and this main body pivot joint at the opposite side of the relative bearing of pull bar, and it is prominent upright to side to be provided with a disconnected guide card;

An if shell fragment, its shape presents two ends and has the bending curvature, wherein the predeterminated position of this shell fragment is to be recessed to form a bounce-back point downwards, and it is relative with a contact chip that is positioned at the main body stage casing that contiguous this bounce-back point is then established a contact button, and the while also makes this disconnected guide card also with respect between the two; One end of shell fragment then is provided with a junction point, and the other end then has a V-type groove;

If a bimetal leaf is established a pivot chalaza with the one end, the junction point that articulates this shell fragment simultaneously is on a contact chip, and it is corresponding with contact point that the other end of this bimetal leaf can stretch into this shell fragment bottom;

This button is chimeric goes into behind the accommodation space is to become the pivot joint state with main body, and joins at the pivoting point that the bottom of button predeterminated position is established one group of pivot button and this pull bar.

Images