KR20230142092A - Sensor lighting that does not require a holder for fixing the ballast - Google Patents

Abstract

The bimetal type thermostat capable of insert injection according to the present invention is equipped with an anti-pressing cap on the top of the existing thermostat to prevent the top of the thermostat from being distorted during the injection process where a certain pressure is generated and the bimetal element provided therein is deformed. By preventing this, the defect rate during the thermostat insert injection process can be minimized and the thermostat, an electrical component, can be completely waterproofed.

Description

Bimetal type thermostat capable of insert injection { Sensor lighting that does not require a holder for fixing the ballast }

The present invention relates to a bimetallic thermostat capable of insert injection. More specifically, the present invention relates to a bimetallic thermostat capable of insert injection, and more specifically, to prevent the upper part of the thermostat from being distorted and deforming the bimetallic element provided therein during the injection process in which a predetermined pressure is generated. It relates to a bimetal type thermostat capable of insert injection and equipped with an anti-squeezing cap that can support the pressure set in.

In general, a thermostat is a temperature switch that allows a blocked fluid, such as coolant, to pass or cuts off the connected power when a certain temperature is reached. It is an accessory widely used in automobile cooling systems and various electrical and electronic components.

Meanwhile, Domestic Public Utility Model No. 20-2000-0020485 was disclosed as technical documentation for thermostats used in conventional electrical and electronic components.

Here, looking at the structure of a thermostat used in conventional electrical and electronic components, as shown in FIG. 1, a housing 2 with one side open, and a pair of terminals 3 connected to the inside of the housing 2. and a movable terminal (4) that connects or shorts a pair of terminals (3), a movable rod (5) that pushes the movable terminal (4) in one direction, and is in contact with one surface of the movable rod (5). It consists of a bimetal element (6) whose curved direction is reversed at a predetermined temperature, and a cover (7) that covers one side of the housing (2).

On the other hand, in the conventional thermostat, the bimetal element 6 is easily deformed by external shock, resulting in malfunction of the thermostat. To solve this problem, an external case was manufactured as shown in Figure 2(a). This makes it possible to protect the thermostat from external shock.

However, the external case mounted on the conventional thermostat did not completely block moisture and water flowing in from the outside, causing other defects such as electric leakage. To solve this problem, the thermostat was installed as shown in Figure 2(b). It was produced using the insert injection method, which involves injection with the stats mounted inside.

However, in thermostats manufactured by conventional insert injection, the cover (7) is pressed by the pressure generated during insert injection, forcing the shape of the bimetal element (6) provided inside it to be reversed, which causes a large amount of thermostats to be used. There was a problem with manufacturing defects.

The present invention was created to solve the problems of the prior art as described above. The purpose of the present invention is to provide an anti-squeezing cap on the top of the existing thermostat to prevent the top of the thermostat from being distorted during the injection process where a certain pressure is generated and the inside of the thermostat to be damaged. By preventing deformation of the bimetal element provided in the thermostat, the defect rate during the insert injection process of the thermostat can be minimized, and the bimetal type thermostat capable of insert injection is provided to completely waterproof the thermostat, which is an electrical component.

The bimetal type thermostat capable of insert injection according to the present invention to achieve the above object is a bimetal type thermostat that blocks electricity at a set temperature and consists of a box-shaped housing body and an installation part recessed into the interior of the housing body. Housing part; A terminal portion consisting of a pair of input terminals inserted into the housing main body, a contact terminal bent inward at both ends of the input terminal, and a rotating terminal rotated up and down to short-circuit electricity between the contact terminals; ; A block body inserted into the installation part, a block seating groove recessed from the upper surface of the block body downward, a locking protrusion protruding outward on the outer surface of the block body so as to be caught on the upper part of the housing part, and a guide block portion consisting of a movable hole drilled in a vertical direction at the center of the block body; a rod-shaped movable rod that is inserted into the movable hole and presses the rotating terminal in a downward direction; a plate-shaped bimetal element that is seated on the upper surface of the block seating groove and whose shape is curved upward and is reversed downward at a predetermined temperature so that the movable rod is pressed downward; a closing cap that covers the upper surface of the housing portion to protect the bimetal element on the upper portion of the housing portion; It is characterized in that it is composed of; an anti-pressing cap that covers the upper part of the finishing cap to prevent the finishing cap from being pressed by pressure generated when the insert is injected on the upper part of the finishing cap.

The anti-press cap is formed on a support wall in close contact with the upper outer surface of the housing portion and an inner surface of the support wall, and has a height determined from the top of the finishing cap to prevent the pressure generated during insert injection from being directly transmitted to the finishing cap. It is characterized by being composed of a pressure-resistant wall curved.

The inner surface of the support wall is characterized in that a prevention cap support extending to the same length as the locking protrusion is formed to prevent the finishing cap from being pressed into the block seating groove.

The outer surface of the anti-press wall is characterized in that a polygonal support portion bent inward is formed to support the pressing force generated in the downward direction when the anti-press wall is pressed.

As such, the bimetal type thermostat capable of insert injection according to the present invention has the following effects.

First, by providing an anti-squeezing cap on the top of the finishing cap to prevent the closing cap from being distorted and deforming the bimetal element during the injection process where a certain pressure is generated, the thermostat, which is an electrical component, can be completely waterproofed. The defect rate can be minimized during the thermostat insert injection process.

Second, by forming an anti-pressure wall curved at a set height at the top of the finishing cap, damage to the finishing cap can be prevented in advance by preventing the pressure generated during insert injection from being directly transmitted to the finishing cap.

Third, by forming an anti-cap support part extending the same length as the locking protrusion on the inner surface of the support wall, the pressure generated during insert injection prevents the support wall from being pressed inward and can safely support the anti-press cap. There is,

Fourth, by forming a polygonal support bent inward on the outer surface of the anti-press wall, it is possible to primarily support compression through the strength of stainless steel and secondarily prevent additional compression through the corners of the polygonal support. This has the effect of safely supporting the anti-press cap.

Figure 1 is a front cross-sectional view of a conventional bimetal type thermostat;
Figure 2 is a photograph showing a conventional bimetal type thermostat in use. (a) is a photograph showing an external case for shock prevention mounted on the outside of the thermostat, and (b) is a photograph showing the thermostat mounted inside. This is a photo showing the injection molded insert.
Figure 3 is a perspective view and an exploded perspective view showing the bimetal type thermostat according to the present invention;
Figure 4 is a cross-sectional view showing the bimetallic thermostat according to the present invention, where (a) is a cross-sectional view showing the movable rod in a raised state, and (b) is a cross-sectional view showing the movable rod in a lowered state,
Figure 5 is a cross-sectional view showing the operation of the anti-pressure wall according to the present invention;
Figure 6 is a partial enlarged view showing the operation of the prevention cap support portion by enlarging portion "A" shown in Figure 5;
Figure 7 is a view showing a polygonal support according to the present invention, where (a) is a perspective view and (b) is a plan view.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the attached drawings.

The bimetal type thermostat capable of insert injection according to the present invention is a bimetal type thermostat (1) that blocks electricity at a predetermined temperature, and as shown in Figures 3 and 4, it includes a box-shaped housing body (11) and the housing. A housing portion (10) consisting of an installation portion (12) recessed into the main body (11); Between a pair of input terminals 21 inserted into the housing body 11, a contact terminal 22 bent inward at both ends of the input terminal 21, and the contact terminal 22. a terminal portion (20) consisting of a rotating terminal (23) that rotates up and down to short-circuit electricity; A block body 31 inserted into the installation part 12, a block seating groove 32 recessed in the downward direction from the upper surface of the block body 31, and an outer surface of the block body 31. A guide block unit (30) consisting of a locking protrusion (33) protruding outward to be hung on the upper part of the housing unit (10) and a movable hole (34) perforated in the vertical direction in the center of the block body (31). and; a rod-shaped movable rod 40 that is inserted into the movable hole 34 and presses the pivot terminal 23 in a downward direction; a plate-shaped bimetal element 50 that is seated on the upper surface of the block seating groove 32 and whose shape is curved upward and is reversed downward at a predetermined temperature so that the movable rod 40 is pressed downward; a finishing cap 60 covering the upper surface of the housing part 10 to protect the bimetal element 50 on the upper part of the housing part 10; It is composed of an anti-pressure cap 70 that covers the top of the finishing cap 60 to prevent the bimetal element 50 from being pressed by pressure generated during injection molding of the insert on the top of the finishing cap 60. .

Meanwhile, the closing cap 60 is made of aluminum with excellent heat conductivity to easily transfer heat to the bimetal element 50, and the anti-pressing cap 70 is made of aluminum to prevent it from being easily crushed by external impact. It is preferable that it is made of stainless steel, which has higher strength.

And, as shown in FIG. 5, the anti-press cap 70 is formed on a support wall 71 in close contact with the upper outer surface of the housing portion 10, and on the inner surface of the support wall 71, and is formed by an insert. It consists of a pressure-prevention wall 72 curved to a predetermined height (h) at the top of the finishing cap 60 to prevent the pressure generated during injection from being directly transmitted to the finishing cap 60.

Meanwhile, the anti-pressing wall 72 is pressed downward when a pressing force is generated from the outside, and is spaced apart from the upper surface of the closing cap 60 by a predetermined height to prevent the pressing from being directly transmitted to the finishing cap 60. It is desirable to form a curve.

In addition, as shown in FIG. 6, the inner surface of the support wall 71 has a length equal to that of the locking protrusion 33 to prevent the finishing cap 60 from being pressed into the block seating groove 32. A prevention cap support portion 73 extending to L) is formed.

And, as shown in FIG. 7, on the outer surface of the anti-press wall 72, a polygonal support portion 74 is bent inward to support the pressing force generated in the downward direction when the anti-press wall 72 is pressed. is formed.

Meanwhile, when the anti-pressing wall 72 is pressed downward during insert injection, the polygonal support portion 74 forms a plurality of corners and presses inward to provide additional support for being pressed downward, forming a plurality of non-circular shapes. It is preferable that it is formed in a polygonal shape made of straight lines.

The operation of the bimetal type thermostat capable of insert injection according to the present invention configured as described above is as follows.

The bimetal type thermostat capable of insert injection according to the present invention is a bimetal type thermostat (1) that cuts off electricity at a set temperature.

That is, as shown in Figures 3 and 4, the rotating terminal 23 rotates up and down on the pair of terminal parts 20 inserted into the housing part 10 and contacts or shorts the contact terminal 22. By providing, when a specific condition is met, that is, when a predetermined temperature is reached, the rotating terminal 23, which is normally in contact, is short-circuited to the bottom to cut off the electric power.

At this time, by providing a movable rod 40 that rises and lowers in the vertical direction on the upper part of the pivot terminal 23, the pivot terminal 23 is lowered when the movable rod 40 is lowered, and the movable rod 40 ) can be brought into contact with the rotating terminal 23 when rising.

Here, the movable rod 40 is formed on the block body 31 mounted on the upper part of the housing portion 10 and is inserted into the movable hole 34 drilled in the vertical direction, thereby forming the rotating terminal 23. You can now press or raise it accurately.

Meanwhile, a block seating groove 32 recessed in the downward direction is formed on the upper part of the block body 31, and a bimetal element 50 whose shape is reversed at a predetermined temperature is seated on the upper surface of the block seating groove 32. As a result, the plate-shaped bimetal element 50 curved upward is reversed at a predetermined temperature, that is, is curved and deformed downward, pushing the movable rod 40 downward and short-circuiting the rotating terminal 23. It becomes possible.

In addition, by providing a finishing cap 60 on the upper part of the housing part 10 to cover the upper surface of the housing part 10 to protect the bimetal element 50, the bimetal element 50 is prevented from coming out. In addition, it becomes possible to block external shocks.

Here, an anti-pressure cap 70 is further included to cover the top of the finishing cap 60 to prevent the finishing cap 60 from being pressed by pressure generated during insert injection. As a result, the finishing cap 60 made of aluminum, which is easily distorted, can be protected from the top in order to increase thermal conductivity, so that the finishing cap 60 is distorted during insert injection, causing a defect in which the bimetal element 50 is forcibly deformed to the lower part. can be prevented in advance.

Therefore, by providing the anti-squeezing cap 70 on the top of the finishing cap 60, it is possible to prevent the closing cap 60 from being distorted and the bimetal element 50 from being deformed during the injection process in which a predetermined pressure is generated. This makes it possible to minimize the defect rate during the insert injection process of the thermostat (1).

Here, as shown in FIG. 5, the anti-press cap 70 has a press curved at a predetermined height from the top of the finish cap 60 to prevent the pressure generated during insert injection from being directly transmitted to the finish cap 60. By forming the prevention wall 72, the generated pressure is pressed only within the determined height, preventing the pressure from being transmitted to the finishing cap 60, thereby preventing damage to the finishing cap 60 in advance. do.

In addition, as shown in FIG. 6, the inner surface of the support wall 71 has a length equal to that of the locking protrusion 33 to prevent the finishing cap 60 from being pressed into the block seating groove 32. By forming the extended prevention cap support portion 73, the pressure generated during insert injection prevents the inside of the support wall 71 from being pressed. This can be prevented in advance through the support portion 73, and the lower surface of the anti-press cap 70 can be safely supported.

And, as shown in FIG. 7, on the outer surface of the anti-press wall 72, a polygonal support portion 74 is bent inward to support the pressing force generated in the downward direction when the anti-press wall 72 is pressed. is formed, so that when the anti-pressure wall 72 is pressed downward during insert injection, it is primarily supported through the strength of stainless steel, and secondarily, it is pushed downward through the corner portion M of the polygonal support portion 74. This provides additional support for what is being pressed.

This is to support the anti-pressure wall 72 so that it cannot be easily pressed by making a number of bends through the inwardly bent portion of the polygonal support portion 74, that is, the corner portion (M). The bearing capacity can be further increased compared to the outer surface of a circular shape without bending.

The present invention is not limited to the specific preferred embodiments described above, and various modifications can be made by anyone skilled in the art without departing from the gist of the invention as claimed in the claims. Of course, such changes are within the scope of the claims.

<Explanation of symbols for main parts of the drawing>
1: Thermostat 10: Housing part
11: Housing body 12: Installation part
20: terminal 21: input terminal
22: contact terminal 23: rotating terminal
30: Guide block part 31: Block body
32: Block seating groove 33: Locking jaw
34: movable hole 40: movable rod
50: Bimetal element 60: Closing cap
70: anti-press cap 71: support wall
72: anti-pressing wall 73: anti-pressing cap support
74: multi-angled support

Claims (4)

In the bimetal type thermostat (1) that cuts off electricity at a set temperature,
A housing portion (10) consisting of a box-shaped housing body (11) and an installation portion (12) recessed into the interior of the housing body (11);
Between a pair of input terminals 21 inserted into the housing body 11, a contact terminal 22 bent inward at both ends of the input terminal 21, and the contact terminal 22. a terminal portion (20) consisting of a rotating terminal (23) that rotates up and down to short-circuit electricity;
A block body 31 inserted into the installation part 12, a block seating groove 32 recessed in the downward direction from the upper surface of the block body 31, and an outer surface of the block body 31. A guide block unit (30) consisting of a locking protrusion (33) protruding outward to be hung on the upper part of the housing unit (10) and a movable hole (34) perforated in the vertical direction in the center of the block body (31). and;
a rod-shaped movable rod 40 that is inserted into the movable hole 34 and presses the pivot terminal 23 in a downward direction;
a plate-shaped bimetal element 50 that is seated on the upper surface of the block seating groove 32 and whose shape is curved upward and is reversed downward at a predetermined temperature so that the movable rod 40 is pressed downward;
a finishing cap 60 covering the upper surface of the housing part 10 to protect the bimetal element 50 on the upper part of the housing part 10;
Characterized by being composed of a pressure-resistant cap 70 that covers the top of the finishing cap 60 to prevent the bimetal element 50 from being pressed by pressure generated during insert injection on the top of the finishing cap 60. Bimetal type thermostat capable of insert injection. According to claim 1,
The anti-press cap 70 is formed on a support wall 71 in close contact with the upper outer surface of the housing portion 10, and on the inner surface of the support wall 71, and the pressure generated during insert injection is applied to the finishing cap. A bimetal type thermostat capable of insert injection, characterized in that it consists of an anti-pressure wall (72) curved at a predetermined height at the top of the finishing cap (60) to prevent direct transmission to (60). According to claim 2,
On the inner surface of the support wall 71, there is a prevention cap support portion 73 extending to the same length as the locking protrusion 33 to prevent the finishing cap 60 from being pressed into the block seating groove 32. A bimetallic thermostat capable of insert injection, characterized in that it is formed. According to claim 2,
Insert injection molding is characterized in that a polygonal support portion 74 bent inward is formed on the outer surface of the anti-press wall 72 to support the pressing force generated in the downward direction when the anti-press wall 72 is pressed. Possible bimetal type thermostat.

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