CN211350472U

CN211350472U - Contact bimetallic strip temperature controller

Info

Publication number: CN211350472U
Application number: CN201921910485.2U
Authority: CN
Inventors: 庄士春
Original assignee: PACIFIC ELECTRONIC (KUNSHAN) CO Ltd
Current assignee: PACIFIC ELECTRONIC (KUNSHAN) CO Ltd
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2020-08-25
Anticipated expiration: 2029-11-07

Abstract

The utility model discloses a contact bimetallic strip temperature controller, include: the casing, bottom plate and bimetallic strip, the casing set up in the top of bottom plate and with bottom plate fixed connection, the intermediate position of casing is equipped with the bulge, the top of bulge has set firmly the bimetallic strip, be equipped with vertical through-hole in the bulge, it has the ejector pin to alternate in the vertical through-hole, the one end of bottom plate sets up No. one the terminal, the one end of No. one the terminal is connected with the shell fragment, set up first contact and second contact on the shell fragment, the other end of bottom plate sets up No. two terminals and No. one the terminal each other is symmetrical, the one end of No. two terminals is equipped with the third contact, third contact and the cooperation of second contact. The utility model discloses a volume is less, can be suitable for in small-size or miniature electrical apparatus.

Description

Contact bimetallic strip temperature controller

Technical Field

The utility model belongs to the technical field of the temperature control technique and specifically relates to a contact bimetallic strip temperature controller is related to.

Background

Because the bimetallic strip temperature controller has the advantages of more accurate temperature control, excellent electrical performance, simple manufacture, low price and practicability, the bimetallic strip temperature controller is widely applied to small household appliances, motors, rectifying equipment and daily electric appliances, and is mainly used for temperature regulation, temperature control, overheating protection and the like.

The working principle of the temperature controller is that the external temperature is firstly transferred to the shell through air and then transferred to the air in the shell, so that the bimetallic strip receives heat, deformation displacement is generated, a contact is engaged and disengaged, and the purposes of connecting and disconnecting a circuit and controlling the temperature are achieved. However, the bimetallic strip of the temperature controller is arranged in the shell, so the temperature transmission is slow, the temperature sensing speed of the bimetallic strip is slow, and in addition, the volume of the temperature controller is also large, so the temperature controller cannot be suitable for small or micro electric appliances.

SUMMERY OF THE UTILITY MODEL

In view of this, an object of the present invention is to provide a contact bimetallic strip temperature controller.

To achieve the above object, the present invention adopts the following:

a contact bimetal thermostat, comprising: a shell, a bottom plate and a bimetallic strip, wherein the shell is arranged above the bottom plate and is fixedly connected with the bottom plate, a bulge is arranged in the middle of the shell, a bimetallic strip is fixedly arranged at the top of the bulge, a vertical through hole is arranged in the convex part, a mandril is inserted in the vertical through hole, one end of the bottom plate is provided with a first terminal, one end of the first terminal is connected with a spring plate, a first contact and a second contact are arranged on the spring plate, the other end of the bottom plate is provided with a second terminal which is symmetrical to the first terminal, one end of the second terminal is provided with a third contact, the third contact is in butt fit with the second contact, the first contact is arranged in the middle of the elastic sheet, the vertical through hole is located right above the first contact, the ejector rod is located between the bimetallic strip and the first contact, and the ejector rod just abuts against the bimetallic strip and the first contact.

The bimetallic strip is arranged at the position exposed outside the shell, so that the bimetallic strip can be directly contacted with air, the bimetallic strip is more sensitive to the external temperature change, and the temperature sensing sensitivity is improved; realize circuit connection or disconnection circuit through the shell fragment between a terminal and No. two terminals, shell fragment one end sets firmly on a terminal, and the cooperation of second contact on the shell fragment and the third contact butt on No. two terminals on the shell fragment makes to be connected the cooperation mode between shell fragment and No. two terminals inseparabler, has improved the bad problem of contact resistance between the contact effectively, and is favorable to the terminal heat dissipation.

Preferably, the housing and the bottom plate are fixedly connected by embedding rivets at two ends, and the rivets respectively penetrate through the first terminal and the second terminal.

Preferably, the bimetallic strip is fixed on the top of the protruding part through a metal cover, and a groove is further arranged in the protruding part.

Preferably, the bimetal is in a circular concave shape.

Preferably, the bimetal has a diameter of 6mm and a thickness of 0.07 mm.

Preferably, the height of the shell fixed with the bottom plate is not more than 7.55 mm.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model provides a bimetallic strip exposes outside the temperature controller casing, makes it can be direct and the air contact, makes bimetallic strip more sensitive to external temperature variation, improves temperature sensing sensitivity.

2. The utility model discloses a volume is less, can be suitable for in small-size or miniature electrical apparatus.

3. The utility model provides a bimetallic strip diameter and thickness are all less, and the temperature sensing effect is more obvious, and is faster to temperature change's reaction rate.

Drawings

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Fig. 1 is a sectional view of a contact bimetallic strip thermostat of the present invention;

fig. 2 is a top view of a contact bimetallic strip thermostat of the present invention;

fig. 3 is a side view of a contact bimetallic strip thermostat of the present invention;

in the figures, the various reference numbers are:

1-bottom plate, 2-shell, 3-bimetallic strip, 4-first terminal, 5-second terminal, 6-bulge, 7-vertical through hole, 8-ejector rod, 9-groove, 10-metal cover, 11-rivet, 12-spring plate, 13-first contact, 14-second contact and 15-third contact.

Detailed Description

In order to illustrate the invention more clearly, the invention is further described below with reference to preferred embodiments. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.

As shown in fig. 1 to 3, a contact-type bimetal thermostat includes: the number of the housings 2 is such that, bottom plate 1 and bimetallic strip 3, casing 2 set up in bottom plate 1 top and with bottom plate 1 fixed connection, the intermediate position of casing 2 is equipped with bulge 6, the top of bulge 6 has set firmly bimetallic strip 3, be equipped with vertical through-hole 7 in the bulge 6, it has ejector pin 8 to alternate in the vertical through-hole 7, the one end of bottom plate 1 sets up No. 4 terminal, the one end of No. 4 terminal is connected with shell fragment 12, set up first contact 13 and second contact 14 on the shell fragment 12, the other end of bottom plate 1 sets up No. 5 terminal 5 and No. two terminal 5 and No. 4 terminal each other for the symmetry, the one end of No. 5 terminal is equipped with third contact 15, third contact 15 and 14 butt cooperations of second contact, first contact 13 sets up the intermediate position at the shell fragment, vertical through-hole 7 is located directly over first contact 13, ejector pin 8 is located between bimetallic strip 3 and the first contact 13 and ejector pin 8 just withstands bimetallic strip 3 and first contact 13.

Further, the bimetal 3 is fixed on the top of the protrusion 6 through a metal cover 10, and a groove 9 is further formed in the protrusion 6.

Further, the bimetal 3 is in a circular concave shape. The bimetal 3 is provided with a circular concave shape in order to be engaged with the groove 9, i.e. to be able to be concave into the groove 9 when the bimetal 3 is deformed and displaced.

Further, the bimetal 3 has a diameter of 6mm and a thickness of 0.07 mm. The diameter and the thickness of the bimetallic strip 3 both reach a smaller size, so that the temperature sensing effect of the bimetallic strip 3 is more obvious, and the reaction speed is higher.

Further, the height of casing 2 after fixed with bottom plate 1 is no longer than 7.55mm, promptly the utility model discloses a height value when the level is placed. Guaranteed like this the utility model discloses a whole volume can reach less degree, can adapt small-size or miniature electrical apparatus.

Casing 2 and bottom plate 1 carry out fixed connection through embedding rivet 11 at both ends, and rivet 11 passes a terminal 4 and No. two terminals 5 respectively, and the purpose that sets up like this is to save unnecessary wiring and part, only relies on between two terminals to realize circuit connection or open circuit through the cooperation of shell fragment 12, makes overall structure smaller and more exquisite, more is applicable to small-size or miniature electrical apparatus.

The bimetallic strip 3 is of a circular sunken structure, the groove 9 is arranged in the protruding part 6, when the bimetallic strip 3 deforms due to the fact that the sensed external temperature reaches a set temperature value, the bimetallic strip 3 can be sunken into the groove 9, the bimetallic strip 3 presses the ejector rod 8 to vertically move downwards, the ejector rod 8 pushes the first contact 13 on the elastic sheet 12, the second contact 14 is separated from the third contact 15, and at the moment, a circuit between the first terminal 4 and the second terminal 5 is disconnected; when the external temperature drops below the set temperature value of the bimetallic strip 3, the bimetallic strip 3 is restored to the original state, the upper part of the ejector rod 8 is not pressed by the bimetallic strip 3 any more, and moves upwards under the elastic action of the elastic sheet 12 until the second contact 14 is abutted against the third contact 15 again, and at the moment, the circuit between the first terminal 4 and the second terminal 5 is switched on again.

Obviously, the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it is obvious for those skilled in the art to make other variations or changes based on the above descriptions, and all the embodiments cannot be exhausted here, and all the obvious variations or changes that belong to the technical solutions of the present invention are still in the protection scope of the present invention.

Claims

1. A contact bimetallic strip thermostat, characterized in that includes: a shell, a bottom plate and a bimetallic strip, wherein the shell is arranged above the bottom plate and is fixedly connected with the bottom plate, a bulge is arranged in the middle of the shell, a bimetallic strip is fixedly arranged at the top of the bulge, a vertical through hole is arranged in the convex part, a mandril is inserted in the vertical through hole, one end of the bottom plate is provided with a first terminal, one end of the first terminal is connected with a spring plate, a first contact and a second contact are arranged on the spring plate, the other end of the bottom plate is provided with a second terminal which is symmetrical to the first terminal, one end of the second terminal is provided with a third contact, the third contact is in butt fit with the second contact, the first contact is arranged in the middle of the elastic sheet, the vertical through hole is located right above the first contact, the ejector rod is located between the bimetallic strip and the first contact, and the ejector rod just abuts against the bimetallic strip and the first contact.

2. The contact bimetal thermostat of claim 1, wherein the housing is fixedly connected to the base plate by inserting rivets into both ends of the housing, and the rivets pass through the first terminal and the second terminal, respectively.

3. A contact bimetal thermostat according to claim 1, wherein the bimetal is fixed on top of the protrusion by a metal cover, and the protrusion is further provided with a groove therein.

4. A contact bimetal thermostat of claim 1, wherein the bimetal is in the shape of a circular recess.

5. A contact bimetal thermostat according to claim 4, wherein the bimetal has a diameter of 6mm and a thickness of 0.07 mm.

6. A contact bimetal thermostat according to claim 1, wherein the height of the housing fixed to the base plate is not more than 7.55 mm.