A ceramic temperature controller

Abstract

The utility model discloses a kind of ceramic temperature controllers, comprising: the shell of ceramic material composition, the bottom of shell is throughly provided with the insertion slot being communicated with cavity, the cross section of insertion slot is rectangular, electric terminal is inserted in insertion slot, electric terminal includes the pin of the below of insertion slot and two connection parts being connected with pin and passing through insertion slot upwards, two connection parts are arranged at interval and elastically abut to the length direction of two ends of insertion slot, the upper side of connection part is equipped with electric contact piece, two mounting holes for the upper end of two connection parts are provided on electric contact piece.When two connection parts of electric terminal are inserted into insertion slot, two connection parts elastically abut to the length direction of two ends of insertion slot, the distance between the upper end of two connection parts is enlarged using two mounting holes of electric contact piece to make the side of connection part keep abutting to insertion slot, so that insertion slot and electric terminal are connected firmly, so as to ensure stable and reliable when using under high temperature working condition.

Description

Technical Field

[0001] This utility model relates to a ceramic temperature controller. Background Technology

[0002] When the temperature controller is subjected to high temperature conditions during operation, the bimetallic strip inside the temperature controller will deform due to heat, causing the moving contact and the stationary contact to separate, thereby disconnecting the circuit and achieving the corresponding protection function.

[0003] In high-temperature operating conditions, where temperatures exceeding 250°C are required, the temperature controller housing is typically made of ceramic. Both moving and stationary conductive components are connected to terminals extending beyond the housing. The housing has corresponding slots for these terminals to extend from the slots. However, molding these slots in the ceramic housing results in significant dimensional deviations, with large tolerances in both length and width. This leads to gaps between the terminals and the slots. Due to the high operating temperatures, filling these gaps with filler is not feasible. Therefore, some temperature controllers use rivets to connect the terminals and housing. However, the expansion coefficient of the rivets differs from that of the terminals, causing loosening at the rivet joints under high-temperature conditions. This method fails to completely eliminate the problem of loose terminals relative to the slots. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a ceramic temperature controller in which the slot of the housing is securely connected to the power terminal, preventing any loosening between the power terminal and the housing, thus ensuring stable operation.

[0005] A ceramic temperature controller according to an embodiment of the present invention includes: a housing made of ceramic material, the housing having a cavity, a slot communicating with the cavity through the bottom of the housing, the slot having a rectangular cross-section, a power terminal inserted into the slot, the power terminal including a pin extending below the slot and two connecting portions connected to the pin and extending upward through the slot, the two connecting portions being spaced apart and elastically abutting against both ends of the slot in the length direction, a power contact plate above the connecting portions, the power contact plate having two mounting holes for the upper ends of the two connecting portions to be inserted respectively, the two mounting holes driving the upper ends of the two connecting portions away from each other so that the sides of the two connecting portions are always abutting against both ends of the slot in the length direction.

[0006] A ceramic temperature controller according to an embodiment of the present invention has at least the following beneficial effects:

[0007] The temperature controller with the above structure uses two spaced-apart connectors on the pins to be inserted into the slot. The two connectors are elastically pressed against both ends of the slot along its length. The two mounting holes of the contact plate are used to widen the distance between the upper ends of the two connectors so that the sides of the connectors are pressed against the slot. This makes the slot and the contact terminal firmly connected and prevents the contact terminal from loosening with the housing, thus ensuring stable and reliable operation under high-temperature conditions.

[0008] In some embodiments of this utility model, the length direction of the cross-section of the slot is a first direction, the lower limit dimension and the upper limit dimension of the slot along the first direction are a and b respectively, and the maximum distance between the two connecting parts along the outer sidewalls of the first direction is e, satisfying: e > b.

[0009] In some embodiments of this utility model, the mounting hole is a rectangular through hole extending along the first direction, the minimum distance between two rectangular through holes is f, and the minimum distance between the inner sidewalls of two connecting parts along the first direction is g, satisfying: f > g.

[0010] In some embodiments of this utility model, the upper end of the connecting part is provided with two anti-detachment parts that are opposite to each other to tighten the mounting hole. The anti-detachment parts are inclined from bottom to top along the opposite direction to prevent the anti-detachment parts from moving up and down relative to the contact piece.

[0011] In some embodiments of this utility model, the anti-detachment part is formed by stamping the upper part of the connecting part, and the upper end of the connecting part is formed with a punching groove between the two anti-detachment parts.

[0012] In some embodiments of this utility model, the width direction of the cross-section of the slot is a second direction, and the connecting part is provided with a tightening part that protrudes along the second direction, the tightening part abutting against the inner sidewall of the slot in the second direction.

[0013] In some embodiments of this utility model, the tightening part is a protruding rib extending along the depth direction of the slot or a protrusion formed on the side wall of the connecting part.

[0014] In some embodiments of this utility model, the upper end of the rib is provided with a triangular guide bevel.

[0015] In some embodiments of this utility model, the lower end of the slot is provided with a flared portion, and a stop step is formed between the flared portion and the lower end of the slot. At the junction of the connecting portion and the pin, there is a widened portion that is inserted into the flared portion and abuts against the stop step. The widened portion is tightly fitted with the flared portion.

[0016] In some embodiments of this utility model, a horizontal connecting section is provided between the pin and the widened portion, the bottom wall of the housing is provided with a groove that cooperates with the horizontal connecting section, and the upper surface of the horizontal connecting section is provided with a protrusion that abuts against the inner top wall of the groove.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the structure of one embodiment of the ceramic temperature controller of this utility model;

[0020] Figure 2 for Figure 1 An internal screenshot of an embodiment;

[0021] Figure 3 for Figure 1 Schematic diagram of the structure after removing the casing in the embodiment;

[0022] Figure 4 for Figure 3 A schematic diagram of another view of one of the electrical terminals;

[0023] Figure 5 This is a schematic diagram showing the separation of the electrical terminals, electrical contacts, and housing slots.

[0024] Figure label:

[0025] Housing 100; cavity 110; slot 120; flared portion 130; stop step 140; recess 150; power terminal 200; pin 210; connecting portion 220; anti-detachment portion 221; punched groove 222; rib 223; bulge 224; guide bevel portion 225; widened portion 226; horizontal connecting section 227; protrusion 228; power contact piece 300; mounting hole 310. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] In the description of this utility model, it should be understood that the directional descriptions, such as the terms "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] See Figures 1 to 5 This utility model discloses a ceramic temperature controller, comprising: a housing 100 made of ceramic material, the housing 100 having a cavity 110 therein, and a slot 120 communicating with the cavity 110 through the bottom of the housing 100. The slot 120 has a rectangular cross-section, and an electrical terminal 200 is inserted into the slot 120. The electrical terminal 200 includes a pin 210 extending below the slot 120 and two pins 210 connected to the pins 210 and extending upward through the slot 120. The connector 220 of the slot 120 is arranged at intervals and elastically abuts against both ends of the slot 120 in the length direction. A contact plate 300 is provided above the connector 220. The contact plate 300 has two mounting holes 310 for inserting the upper ends of the two connectors 220 respectively. The two mounting holes 310 drive the upper ends of the two connectors 220 away from each other so that the sides of the two connectors 220 are always abutted against both ends of the slot 120 in the length direction.

[0031] The temperature controller with the above structure uses two spaced connecting parts 220 on the pins 210 of the power terminal 200 to be inserted into the slot 120. The two connecting parts 220 inserted into the slot 120 undergo elastic deformation and press against the two ends of the slot 120 in the length direction. At this time, the upper ends of the two connecting parts 220 will move closer to each other. Then, the two mounting holes 310 of the power contact plate 300 are aligned with the upper ends of the two connecting parts 220 and inserted downwards. The two mounting holes 310 can widen the distance between the upper ends of the two connecting parts 220 so that the sides of the two connecting parts 220 are pressed against the two ends of the slot 120 in the length direction, which strengthens the tight fit and stability between the connecting parts 220 and the slot 120. This makes the slot 120 and the power terminal 200 firmly connected, and the power terminal 200 and the housing 100 will not loosen. This ensures that the temperature controller is stable and reliable when used under high temperature conditions and has a long service life.

[0032] It should be noted that the length and width dimensions of the rectangular cross-section of slot 120 are the length and width dimensions of slot 120, respectively, and the vertical dimension of slot 120 is the depth of slot 120. The cavity 110 of housing 100 is used to accommodate two contact pieces 300, a portion of two contact terminals 200, a moving spring, a stationary contact, a moving contact, a temperature sensing element, etc.

[0033] See Figure 5 In some embodiments of this utility model, the length direction of the cross-section of the slot 120 is a first direction, the lower limit dimension and upper limit dimension of the slot 120 along the first direction are a and b respectively, and the maximum distance between the outer sidewalls of the two connecting parts 220 along the first direction is e, satisfying: e > b. It can be understood that when dimension e is slightly larger than dimension b, the two connecting parts 220 of the electrical terminal 200 can undergo elastic deformation and slightly approach each other when inserted into the slot 120, and the outer sidewall of the connecting part 220 elastically abuts against the inner sidewall of the slot 120 along its length direction, forming a good tight fit effect.

[0034] It should be noted that the difference between dimension e and dimension b should not be too large, which would make it difficult for the two connecting parts 220 to be inserted into the slot 120, nor should the difference be too small, which would prevent the connecting parts 220 from being stably and elastically pressed against the slot 120. Therefore, the difference between dimension e and dimension b can be determined based on actual testing. In addition, it is conceivable that the spacing between the two connecting parts 220 along the first direction also needs to be limited based on actual testing, so that when the dimension of the slot 120 along the first direction is the lower limit dimension a, the two connecting parts 220 of the electrical terminal 200 can also be inserted into the slot 120.

[0035] See Figure 5In some embodiments of this utility model, the mounting hole 310 is a rectangular through hole extending along the first direction, the minimum distance between two rectangular through holes is f, and the minimum distance between the inner sidewalls of two connecting parts 220 along the first direction is g, satisfying: f > g. It can be understood that when the two connecting parts 220 inserted into the slot 120 undergo elastic deformation and abut against the two ends of the slot 120 in the length direction, the upper ends of the two connecting parts 220 will generate a displacement that brings them closer together, forming the aforementioned distance g. The upper ends of the two connecting parts 220 also form an "eight" shape arrangement, which is not conducive to applying the fixing process between the connecting parts 220 and the contact piece 300. Moreover, after long-term use of the temperature controller, the elastic abutment force of the outer sidewalls of the two connecting parts 220 acting on the inner wall of the slot 120 is prone to decrease. The above structural setting can correct the relative position between the upper ends of the two connecting parts 220 and also maintain a large abutment force of the connecting parts 220 acting on the slot 120. Preferably, the minimum distance f between the two rectangular through holes should be consistent with the distance between the inner walls of the two connecting parts 220 when the power terminal 200 is not inserted into the slot 120. This also helps to accurately process the hole spacing between the two rectangular through holes during pre-production.

[0036] See Figure 2 and Figure 3 In some embodiments of this utility model, to further prevent separation between the contact piece 300 and the connecting part 220, thereby ensuring the accurate positioning of the contact piece 300 and ensuring that the temperature controller maintains normal electrical connection or disconnection during operation, the upper end of the connecting part 220 is provided with two anti-detachment parts 221 that are opposite to each other to tighten the mounting hole 310. The anti-detachment parts 221 are inclined from bottom to top along the opposite direction to prevent the anti-detachment parts 221 from moving up and down relative to the contact piece 300. The contact piece 300 and the contact terminal 200 form an integral structure without the addition of rivets or other fastening structures. Even when working continuously in a high-temperature environment, it will not loosen after multiple thermal expansion and contraction due to the different thermal expansion coefficients of different materials, and has extremely high stability and economy.

[0037] See Figure 2 and Figure 3 In some embodiments of this utility model, in order to further simplify the processing steps of the anti-detachment part 221 and improve production efficiency, the anti-detachment part 221 is formed by stamping the upper part of the connecting part 220, and the upper end of the connecting part 220 is formed with a punching groove 222 between the two anti-detachment parts 221.

[0038] See Figure 2 , Figure 3 and Figure 4In some embodiments of this utility model, the width direction of the cross-section of the slot 120 is a second direction, and the connecting portion 220 is provided with a tightening portion protruding along the second direction, the tightening portion abutting against the inner sidewall of the slot 120 in the second direction. It is understood that the cross-section of the slot 120 is rectangular, and the two connecting portions 220 form a tightening effect along the length direction of the slot 120, thus constraining the displacement of the connecting portions 220 along the width direction of the slot 120. However, when the electrical terminal 200 is subjected to a large external force, if there is a gap along the second direction between the slot 120 and the connecting portion 220, the electrical terminal 200 may still shift. Therefore, providing a tightening portion can solve this problem.

[0039] See Figure 3 and Figure 4 In some embodiments of this utility model, the tightening part is a rib 223 extending along the depth direction of the slot 120 or a protrusion 224 formed on the side wall of the connecting part 220. Both the rib 223 and the protrusion 224 can eliminate the gap between the slot 120 and the connecting part 220 along the second direction. It should be noted that the use of the rib 223 and the protrusion 224 is different. Generally speaking, when the depth dimension of the slot 120 is large, a protrusion 224 is provided at the lower part of the connecting part 220 to tighten against the inner wall of the slot 120 in the second direction. When the depth dimension of the slot 120 is small, a rib extending along the height direction on the side wall of the connecting part 220 can be used. This is because when the depth dimension of the slot 120 is large, if the rib 223 is used, the rib 223 will have a tight fit with multiple positions in the depth direction of the slot 120. The rib 223 can easily remove a large amount of material located on the inner wall of the slot 120, causing the ceramic shell 100 to be crushed.

[0040] See Figure 4 In some embodiments of this utility model, the upper end of the protruding rib 223 is provided with a triangular guide bevel 225 to ensure that the protruding rib 223 can smoothly enter the slot 120 when it is inserted upward from the lower end of the slot 120, which can effectively prevent the housing 100 from being squeezed and burst.

[0041] See Figure 3 and Figure 5In some embodiments of this utility model, the lower end of the slot 120 is provided with a flared portion 130, and a stop step 140 is formed between the flared portion 130 and the lower end of the slot 120. At the junction of the connecting portion 220 and the pin 210, a widened portion 226 is provided, which is inserted into the flared portion 130 and abuts against the stop step. The widened portion 226 is tightly fitted with the flared portion 130. The stop step 140 is used to contact the widened portion 226 to limit the depth of the electrical terminal 200 inserted into the slot 120, thereby determining the relative height position between the electrical terminal 200 and the housing 100, which is beneficial for automated production assembly. Furthermore, the tight fit between the widened portion 226 and the flared portion 130 helps to increase the contact area between the electrical terminal 200 and the slot 120, further improving the firmness of the connection between the electrical terminal 200 and the housing 100 without adding rivets, solidifying fillers, or other materials.

[0042] See Figures 2 to 4 In some embodiments of this utility model, a horizontal connecting section 227 is provided between the pin 210 and the widened portion 226. The bottom wall of the housing 100 is provided with a recess 150 that cooperates with the horizontal connecting section 227. The upper surface of the horizontal connecting section 227 is provided with a protrusion 228 that abuts against the inner top wall of the recess 150. It should be noted that when the tightening portion abuts against the inner sidewall of the slot 120 in the second direction, the power terminal 200 is prone to relative deflection. However, the protrusion 228 abutting against the inner top wall of the recess 150 can counteract the deflection tendency of the power terminal 200, thereby keeping the pin 210 vertically downward for easy connection to an external circuit board.

[0043] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A ceramic temperature controller, characterized in that, include: A ceramic housing (100) has a cavity (110) inside. A slot (120) communicating with the cavity (110) is provided through the bottom of the housing (100). The slot (120) has a rectangular cross-section. An electrical terminal (200) is inserted into the slot (120). The electrical terminal (200) includes a pin (210) extending below the slot (120) and two connecting parts (22) connected to the pin (210) and extending upward through the slot (120). 0), two connecting parts (220) are arranged at intervals and elastically abut against both ends of the slot (120) in the length direction. A contact plate (300) is provided above the connecting part (220). The contact plate (300) has two mounting holes (310) for inserting the upper ends of the two connecting parts (220) respectively. The two mounting holes (310) drive the upper ends of the two connecting parts (220) to move away from each other so that the sides of the two connecting parts (220) are always abut against both ends of the slot (120) in the length direction.

2. The ceramic temperature controller according to claim 1, characterized in that: The length direction of the cross-section of the slot (120) is the first direction. The lower limit dimension and upper limit dimension of the slot (120) along the first direction are a and b, respectively. The maximum distance between the two connecting parts (220) along the outer sidewalls of the first direction is e, which satisfies: e > b.

3. A ceramic temperature controller according to claim 2, characterized in that: The mounting hole (310) is a rectangular through hole extending along the first direction. The minimum distance between two rectangular through holes is f, and the minimum distance between the inner sidewalls of two connecting parts (220) along the first direction is g, satisfying: f > g.

4. A ceramic temperature controller according to claim 1, characterized in that: The upper end of the connecting part (220) is provided with two anti-detachment parts (221) that are opposite to each other to tighten the mounting hole (310). The anti-detachment parts (221) are inclined from bottom to top along the opposite direction to prevent the anti-detachment parts (221) from moving up and down relative to the contact piece (300).

5. A ceramic temperature controller according to claim 4, characterized in that: The anti-detachment part (221) is formed by stamping the upper part of the connecting part (220), and the upper end of the connecting part (220) has a punched groove (222) formed between the two anti-detachment parts (221).

6. A ceramic temperature controller according to claim 1, characterized in that: The width direction of the cross-section of the slot (120) is the second direction, and the connecting part (220) is provided with a tightening part that protrudes along the second direction. The tightening part abuts against the inner sidewall of the slot (120) in the second direction.

7. A ceramic temperature controller according to claim 6, characterized in that: The tightening part is a protruding rib (223) extending along the depth direction of the slot (120) or a protrusion (224) formed on the side wall of the connecting part (220).

8. A ceramic temperature controller according to claim 7, characterized in that: The upper end of the rib (223) is provided with a triangular guide bevel (225).

9. A ceramic temperature controller according to claim 1, characterized in that: The lower end of the slot (120) is provided with a flared portion (130), and a stop step (140) is formed between the flared portion (130) and the lower end of the slot (120). At the junction of the connecting portion (220) and the pin (210), there is a widened portion (226) that is inserted into the flared portion (130) and abuts against the stop step. The widened portion (226) is tightly fitted with the flared portion (130).

10. A ceramic temperature controller according to claim 9, characterized in that: A horizontal connecting section (227) is provided between the pin (210) and the widened portion (226). The bottom wall of the housing (100) is provided with a groove (150) that cooperates with the horizontal connecting section (227). The upper surface of the horizontal connecting section (227) is provided with a protrusion (228) that abuts against the inner top wall of the groove (150).

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