Recyclable NTC thermistor

Abstract

The recoverable NTC thermistor comprises a shell, an adhesive cover plate, a sensitive element, a connecting end, a movable ring, a tray, an anti-explosion groove, a movable plate, an abutting plate, a wedge-shaped plate and a rotating plate. The pressing plate is pressed against the mounting assembly of the sensitive element through the wedge-shaped plate and the rotating plate; the rotating plate is separated from the wedge-shaped plate and the pressing plate, so that the tray is separated from the matching assembly of the shell while the pressing effect on the sensitive element is ensured; by pressing the movable ring, the abutting movable plate and the wedge-shaped plate move downwards, on one hand, the wedge-shaped plate moves downwards, so that the abutting plate moves along the movable groove and abuts against the outer surface of the sensitive element; and on the other hand, the movable plate moves downwards to drive the rotating plate to move downwards to be in contact with the fixed plate, so that the rotating plate moving downwards rotates to abut against the abutting plate, the wedge-shaped plate and the rotating plate act together to act on the top and bottom of the abutting plate, and therefore the abutting plate stably abuts against the outer surface of the sensitive element, and the sensitive element is fixed.

Description

Technical Field

[0001] The present invention relates to the technical field of thermistor structures, and specifically to a recyclable NTC thermistor. Background Technique

[0002] The NTC thermistor is made of metal oxide semiconductor materials such as manganese oxide, nickel oxide, cobalt oxide, etc. These materials have negative temperature coefficient characteristics, and the resistance value decreases as the temperature increases. The PTC thermistor uses ceramic materials such as barium titanate and lead titanate, and its resistance value increases as the temperature increases. In addition, there are also metal thermistors such as platinum and nickel, alloy materials, and organic materials such as polyimide.

[0003] In the preparation of the existing NTC thermistor, the sensitive element is sealed by a shell and a glued cover plate. When preparing in this way, it is inconvenient to install the sensitive element on the shell, and when the sensitive element needs to be replaced, the operation is inconvenient. It is necessary to damage the shell to take out the sensitive element inside for replacement.

[0004] Therefore, we propose a recyclable NTC thermistor. Summary of the Invention

[0005] The purpose of the present invention is to provide a recyclable NTC thermistor to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the present invention provides a recyclable NTC thermistor, including a shell and a glued cover plate covering the shell. A sensitive element is arranged inside the shell, and the sensitive element is connected with a connection end passing through the glued cover plate through a lead wire. It also includes a movable ring clamped between the shell and the glued cover plate. A tray is slidably matched with the bottom of the shell. An explosion-proof groove is opened on the tray. A movable plate connected to the tray and pressing against the movable ring is arranged on the tray. A pressure plate is clamped between the side surface of the movable plate and the sensitive element. A wedge plate clamped with the top end of the pressure plate is arranged below the movable ring. A rotating plate pressing against the bottom end of the pressure plate is rotatably connected to the movable plate. An installation component, when the movable plate descends, the installation component makes the pressure plate press the sensitive element through the wedge plate and the rotating plate. A matching component, when replacing the sensitive element, the matching component makes the rotating plate disengage from the pressure plate, while ensuring the pressing effect on the sensitive element, first makes the tray disengage from the shell, and gradually replaces it.

[0007] Preferably, the mounting assembly includes a fixed plate connected and fixed to the outer shell and cooperating with the rotating plate, a movable groove movably cooperating with the pressure plate is provided on the inner side of the outer shell, a rotating groove rotatably connected to the rotating plate is provided on the movable plate, and a plug-in groove rotatably cooperating with the tray is provided at the bottom of the outer shell.

[0008] Preferably, the mating component includes two symmetrically and obliquely distributed plug rods, the plug rods are elastic rods, the tops of the two plug rods are connected and fixed to the movable ring, and the two plug rods are respectively inserted into the movable plate and the top of the wedge plate.

[0009] Preferably, an elastic member connected to the rotating groove is provided above the rotating plate, which helps to ensure that the rotating plate acts against the pressure plate.

[0010] Preferably, the explosion-proof grooves are distributed in a circle and are provided in three pieces, and a protective film is adhered to the bottom of the explosion-proof grooves to prevent moisture from entering the protective film.

[0011] Preferably, in the laminated structure of the sensitive element, the position of one of the pressing plates corresponds to the position where the tape is adhered.

[0012] Preferably, the end of the rotating plate is inclined, and a convex rod which is pressed and matched with the fixed plate is fixedly connected to the side surface of the rotating plate.

[0013] A method for preparing a recyclable NTC thermistor, using the above-mentioned recyclable NTC thermistor, the specific method comprises the following steps:

[0014] S1, inserting the movable plate into the movable slot, and the tray into the insertion slot;

[0015] S2, placing the sensitive element into the housing, connecting the wedge plate to the movable ring through one of the plug-in rods, then fitting the movable ring to the movable plate, and plugging and fixing the movable ring to the movable plate through another plug-in rod;

[0016] S3, then, install the adhesive cover plate, the adhesive cover plate is adhered to the top of the movable ring and drives the movable ring to move along the inside of the shell, so that the wedge plate is downward and the rotating plate is rotated, thereby pressing the top and bottom positions of the pressing plate, so that the pressing plate is pressed against the outer surface of the sensitive element, and the preparation is completed and put into use;

[0017] S4. When excessive heat is accumulated, the bottom of the tray is stretched along the explosion-proof groove or the sensitive element needs to be replaced, the tray is moved along the plug-in groove, and the movable plate is separated from the movable ring.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] By pressing the movable ring, the movable plate and the wedge plate are pressed to move downward. On the one hand, when the wedge plate moves downward, the pressing plate moves along the movable groove and presses against the outer surface of the sensitive element. On the other hand, when the movable plate moves downward, it drives the rotating plate to move downward. When the rotating plate contacts the fixed plate, the rotating plate that moves downward rotates and presses against the pressing plate. Thus, the wedge plate and the rotating plate act together on the top and bottom of the pressing plate, so that the pressing plate firmly presses against the outer surface of the sensitive element, thereby fixing the sensitive element. This installation method is simple and the operation is convenient;

[0020] When the sensitive element inside the housing needs to be replaced, the tray is moved away from the insertion slot, and the tray is also detached from the housing. Since the wedge plate presses against the top of the pressing plate, and the top of the sensitive element is subject to a clamping effect, pulling the sensitive element from the bottom facilitates taking out the sensitive element inside. When the sensitive element is reinserted from the bottom of the housing to the top of the housing, the top of the sensitive element is first inserted and fixed by fitting the inclined surface of the wedge plate. This method is convenient for operation, easy to replace the tray, and enables the movable plate to move along the movable groove, so that the movable plate is connected and fixed to the movable ring again through the insertion rod. This disassembly method is simple and the housing does not need to be damaged to complete the replacement, and it has strong applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the cross-section of the housing and the internal structure of the housing of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the sensitive element detached from the housing of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the tray detached from the insertion slot of the present invention;

[0025] Figure 5 It is a schematic diagram of the structure of the adhesive cover plate detached from the movable ring and the housing of the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the movable plate, the pressing plate and the wedge plate detached from the movable groove of the present invention;

[0027] Figure 7 It is a schematic diagram of the structure of the movable ring detached from the two insertion rods of the present invention;

[0028] Figure 8 It is a schematic diagram of the structure of the pressing plate and the wedge block away from the movable plate of the present invention;

[0029] Figure 9Schematic diagram of the cooperation structure of the rotating plate and the movable plate of the present invention.

[0030] In the figure: 1. Outer shell; 2. Adhesive cover plate; 3. Sensitive element; 4. Connection end; 5. Movable ring; 6. Tray; 7. Explosion-proof groove; 8. Movable plate; 9. Pressure-receiving plate; 10. Wedge plate; 11. Rotating plate; 12. Fixed plate; 13. Movable groove; 14. Rotating groove; 15. Insertion groove; 16. Insertion rod; 17. Elastic member; 18. Convex rod. Specific embodiments

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] Please refer to Figures 1-9 , the present invention provides a recyclable NTC thermistor, including an outer shell 1 and an adhesive cover plate 2 covering the outer shell 1. A sensitive element 3 is provided inside the outer shell 1, and the sensitive element 3 is connected through a lead wire to a connection end 4 passing through the adhesive cover plate 2; further including: a movable ring 5 in pressure contact with the adhesive cover plate 2, a tray 6 is slidably fitted at the bottom of the outer shell 1, an explosion-proof groove 7 is provided on the tray 6, a movable plate 8 connected to the movable ring 5 in pressure contact is provided on the tray 6, a pressure-receiving plate 9 is clamped between the side surface of the movable plate 8 and the sensitive element 3, a wedge plate 10 is provided below the movable ring 5 and is in snap-fit connection with the top end of the pressure-receiving plate 9, and a rotating plate 11 in pressure contact with the bottom end of the pressure-receiving plate 9 is rotatably connected to the movable plate 8; an installation component, when the movable plate 8 descends, the installation component makes the pressure-receiving plate 9 press the sensitive element 3 through the wedge plate 10 and the rotating plate 11; a cooperation component, when replacing the sensitive element 3 or when the capacitor explodes, the cooperation component makes the rotating plate 11 disengage from the pressure-receiving plate 9, while ensuring the pressing effect on the sensitive element 3, first makes the tray 6 disengage from the outer shell 1, and gradually replaces it, and the edge of the movable ring 5 is tightly clamped with the inner wall of the outer shell 1;

[0033] A preparation method of a recyclable NTC thermistor, using the above-mentioned recyclable NTC thermistor, the specific method includes the following steps;

[0034] S1. Insert the movable plate 8 into the movable groove 13, and the tray 6 enters the insertion groove 15, and the tray 6 seals the bottom of the outer shell 1;

[0035] S2. Place the sensitive element 3 into the outer shell 1, connect the wedge plate 10 to the movable ring 5 through one of the insertion rods 16, then fit the movable ring 5 to the movable plate 8, and fix the movable ring 5 and the movable plate 8 in an inserted manner through the other insertion rod 16;

[0036] S3, then, install the adhesive cover plate 2, which is adhered to the top of the movable ring 5 and drives the movable ring 5 to move along the inside of the housing 1, so that the wedge plate 10 moves downward and the rotating plate 11 rotates, thereby pressing the top and bottom positions of the pressing plate 9, so that the pressing plate 9 presses against the outer surface of the sensitive element 3, and the preparation is completed and put into use;

[0037] The mounting assembly includes a fixed plate 12 connected and fixed to the housing 1 and matched with the rotating plate 11, a movable groove 13 movably matched with the pressing plate 9 is provided on the inner side of the housing 1, a rotating groove 14 rotatably connected to the rotating plate 11 is provided on the movable plate 8, and a plug-in groove 15 plug-in matched with the tray 6 is provided at the bottom of the housing 1;

[0038] The mating assembly includes two symmetrically and obliquely distributed plug rods 16, the plug rods 16 are elastic rods, the tops of the two plug rods 16 are connected and fixed to the movable ring 5, and the two plug rods 16 are respectively inserted into the tops of the movable plate 8 and the wedge plate 10;

[0039] In the present application, by pressing the movable ring 5, the movable ring 5 presses the movable plate 8 and the wedge plate 10 to move downward (the movable plate 8 does not move downward a large distance, and the tray 6 will not be separated from the plug-in slot 15, and the tray 6 and the housing 1 are in a sealing device). On the one hand, the wedge plate 10 moves downward, and the inclined surface of the wedge plate 10 makes the pressing plate 9 move along the movable slot 13, so that the pressing plate 9 presses against the outer surface of the sensitive element 3. On the other hand, the movable plate 8 moves downward, driving the rotating plate 11 to move downward, and the rotating plate 11 moving downward contacts the fixed plate 12, and under the restriction of the fixed plate 12, the rotating plate 11 moving downward rotates, so that the end of the rotating plate 11 presses against the pressing plate 9, so that the wedge plate 10 and the rotating plate 11 work together to act on the top and bottom of the pressing plate 9, so that the pressing plate 9 is firmly pressed against the outer surface of the sensitive element 3, thereby fixing the sensitive element 3.

[0040] The top of the housing 1 is sealed by an adhesive cover plate 2, and the adhesive cover plate 2 is plugged and fixed to the two connection ends 4;

[0041] Wherein, the inclined plug rod 16 causes the wedge plate 10 and the movable plate 8 to move downward synchronously;

[0042] S4. When too much heat accumulates and cannot be cooled in time, the bottom of the tray 6 is stretched open along the explosion-proof groove 7 (due to air pressure), or when the sensitive element 3 needs to be replaced, the tray 6 is moved along the plug-in groove 15 and the movable plate 8 is separated from the movable ring 5.

[0043] In this application, in case of an explosion, the interior of the housing 1 is sealed. The huge pressure causes the bottom of the tray 6 to burst open, and the bottom of the tray 6 cracks along the inserted explosion-proof groove 7, thereby releasing the pressure inside the housing 1. At the same time, the pressure causes the tray 6 to move away from the insertion slot 15. The movable plate 8 moves downward, the movable plate 8 disengages from the insertion rod 16, the rotating plate 11 continues to rotate and move downward, and disengages from the pressing plate 9. However, the wedge plate 10 continuously acts on the pressing plate 9 to fix the pressing plate 9 in place. The movable plate 8 continues to move downward and disengages from the housing 1 with the tray 6. This method helps to eliminate the effect of the explosion. The pressure relief effect of the explosion-proof groove 7 during the explosion, combined with the pressure relief effect of the movement of the tray 6, reduces the impact of the explosion on the NTC thermistor;

[0044] Among them, the connection between the movable plate 8 and the tray 6 is a detachable fixed installation, which is convenient for installation and replacement of the sensitive element 3 and the tray 6 for reuse.

[0045] Similarly, when it is necessary to replace the sensitive element 3 inside the housing 1, through mechanical equipment, the tray 6 is made to move away from the insertion slot 15, and the tray 6 is also disengaged from the housing 1. Since the wedge plate 10 presses against the top of the pressing plate 9, and the top of the sensitive element 3 is subject to a clamping effect, by pulling the sensitive element 3 from the bottom, it is convenient to take out the sensitive element 3 inside. When the sensitive element 3 is re-inserted from the bottom of the housing 1 to the top of the housing 1, the top of the sensitive element 3 is first inserted and fixed by fitting the inclined surface of the wedge plate 10. This method is convenient to operate and replace. Finally, the tray 6 is replaced, and the movable plate 8 is moved along the movable groove 13 so that the movable plate 8 is connected and fixed to the movable ring 5 again through the insertion rod 16.

[0046] An elastic member 17 connected to the rotating groove 14 is provided above the rotating plate 11. The end of the rotating plate 11 is at an inclined angle, and a convex rod 18 fixedly connected to the side of the rotating plate 11 is in pressing cooperation with the fixing plate 12;

[0047] When the end of the rotating plate 11 presses against the pressing plate 9, through the action of the elastic member 17, in cooperation with the fixing plate 12 and the convex rod 18, the end of the rotating plate 11 firmly presses against the pressing plate 9, thereby stabilizing the sensitive element 3.

[0048] The explosion-proof grooves 7 are circumferentially distributed and there are three of them. A protective film is pasted at the bottom of the explosion-proof grooves 7. According to the usage situation of the NTC thermistor, when the usage environment of the NTC thermistor is humid, the protective film is used to prevent moisture from affecting the inside of the NTC thermistor.

[0049] The sensitive element 3 is mainly made of metal oxide semiconductor materials, and common components include: transition metal oxides such as manganese oxide (MnO2), nickel oxide (NiO), cobalt oxide (CoO), iron oxide (Fe2O3), etc.

[0050] The sensitive element 3 in this application is of the laminated type (similar to MLCC) or thick film type, so as to facilitate surface mounting in the middle of the housing 1. In this method, after the sensitive element 3 is wound and adhered, it is fixed by the tape adhesion method. The position of one pressing plate 9 corresponds to the position of the tape adhesion, further ensuring the stable adhesion of the sensitive element 3.

[0051] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0052] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A recyclable NTC thermistor, comprising: A housing (1) and an adhesive cover plate (2) arranged on the housing (1), wherein a sensitive element (3) is arranged inside the housing (1), and the sensitive element (3) is connected to a connection end (4) passing through the adhesive cover plate (2) via a lead line; It is characterized by further comprising: A movable ring (5) is sandwiched between the outer shell (1) and the adhesive cover plate (2); a tray (6) is slidably matched at the bottom of the outer shell (1); an explosion-proof groove (7) is provided on the tray (6); a movable plate (8) is connected to the tray (6) and is pressed against the movable ring (5); a pressing plate (9) is sandwiched between the side of the movable plate (8) and the sensitive element (3); a wedge plate (10) is provided below the movable ring (5) and is snap-fitted with the top end of the pressing plate (9); a rotating plate (11) is rotatably connected to the movable plate (8) and is pressed against the bottom end of the pressing plate (9); An installation assembly, wherein when the movable plate (8) descends, the installation assembly causes the pressing plate (9) to press against the sensitive element (3) through the wedge plate (10) and the rotating plate (11); A matching component, when replacing the sensitive element (3), the matching component causes the rotating plate (11) to separate from the pressing plate (9), thereby ensuring the pressing effect on the sensitive element (3) and first causing the tray (6) to separate from the housing (1) for gradual replacement.

2. A recyclable NTC thermistor according to claim 1, characterized in that: The mounting assembly comprises a fixed plate (12) connected and fixed to the outer shell (1) and cooperating with the rotating plate (11); a movable groove (13) movably cooperating with the pressing plate (9) is provided on the inner side of the outer shell (1); a rotating groove (14) rotatably connected to the rotating plate (11) is provided on the movable plate (8); and a plug-in groove (15) plug-in cooperating with the tray (6) is provided on the bottom of the outer shell (1).

3. A recyclable NTC thermistor according to claim 2, characterized in that: The mating assembly comprises two symmetrically and obliquely distributed plug rods (16), the plug rods (16) being elastic rods, the tops of the two plug rods (16) being connected and fixed to the movable ring (5), and the two plug rods (16) being respectively inserted into the tops of the movable plate (8) and the wedge plate (10).

4. A recyclable NTC thermistor according to claim 3, characterized in that: An elastic member (17) connected to the rotating groove (14) is provided above the rotating plate (11).

5. A recyclable NTC thermistor according to claim 3, characterized in that: The explosion-proof grooves (7) are distributed in a circle and are provided in three numbers. A protective film is adhered to the bottom of the explosion-proof grooves (7).

6. A recyclable NTC thermistor according to claim 3, characterized in that: The sensitive element (3) is a laminated structure, wherein the position of one of the pressing plates (9) corresponds to the position of the adhesive tape.

7. A recyclable NTC thermistor according to claim 3, characterized in that: The end of the rotating plate (11) is inclined, and a convex rod (18) is fixedly connected to the side of the rotating plate (11) and is pressed and matched with the fixed plate (12).

8. A method for installing and removing a recyclable NTC thermistor, characterized in that: Assembled using a recyclable NTC thermistor according to any one of claims 1 to 7, the specific installation and disassembly method comprises the following steps: S1, inserting the movable plate (8) into the movable slot (13), and the tray (6) into the insertion slot (15); S2, placing the sensitive element (3) into the housing (1), connecting the wedge plate (10) to the movable ring (5) through one of the plug-in rods (16), then fitting the movable ring (5) to the movable plate (8), and plugging and fixing the movable ring (5) to the movable plate (8) through another plug-in rod (16); S3, then, the adhesive cover plate (2) is installed, and the adhesive cover plate (2) is adhered to the top of the movable ring (5) and drives the movable ring (5) to move along the inside of the housing (1), so that the wedge plate (10) is downward and the rotating plate (11) is rotated, thereby pressing the top and bottom positions of the pressing plate (9), so that the pressing plate (9) is pressed against the outer surface of the sensitive element (3), and the preparation is completed and put into use; S4. When heat accumulation occurs and the bottom of the tray (6) is opened along the explosion-proof groove (7), or when the sensitive element (3) needs to be replaced, the tray (6) is moved along the plug-in groove (15) and the movable plate (8) is separated from the movable ring (5).

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