Quick release structure for heating wire fixing block

Abstract

The utility model discloses a heating wire fixing block quick release structure, which comprises an electrode stem and a heating wire fixing block, the heating wire fixing block is provided with a mounting hole, the mounting hole is provided with a first lug protruding out of the inner wall of the mounting hole, the inner wall of the mounting hole is provided with a positioning pin hole, the electrode stem comprises an upper section and a lower section, and the upper section is provided with a first lug protruding out of the inner wall of the mounting hole. The upper section is a heating wire fixing block, the lower section is a reducing section, the reducing section is provided with a second protruding block protruding out of the peripheral side, a clamping groove is formed between the second protruding block and the upper section, an elastic pin is arranged on the peripheral side of the upper section of the electrode rod, and when the electrode rod is matched with the heating wire fixing block, the first protruding block is clamped into the clamping groove. And the elastic pin extends into the positioning pin hole. According to the utility model, the electrode stem and the heating wire fixing block can be quickly assembled and disassembled through plugging and rotating actions, and the operation efficiency is high.

Description

Technical Field

[0001] The utility model relates to a heating wire fixing structure, belonging to the technical field of electric heating device structures. Background Art

[0002] The heating wire in the vacuum coating equipment is used to heat the cavity. The life of the heating wire is limited and the heating wire needs to be replaced frequently. The existing fixing structure is to first install the heating wire on the heating wire fixing block, and then fix the heating wire fixing block to the electrode with screws. Each time the heating wire is replaced, it is necessary to first loosen the screws fixing the heating wire fixing block, and then separate the heating wire fixing block from the electrode to complete the disassembly of the heating wire fixing block. Due to the limited installation space of the heating wire fixing block, the time required to disassemble and install the heating wire fixing block is relatively long. Utility Model Content

[0003] In view of the above-mentioned defects of the prior art, the present invention provides a quick-disassembly structure of a heating wire fixing block, which aims to facilitate the quick disassembly and assembly of the heating wire fixing block when the space on the end side and the peripheral side of the electrode rod is narrow.

[0004] The technical solution of the utility model is as follows: A quick-release structure of a heating wire fixing block, comprising an electrode rod and a heating wire fixing block, the heating wire fixing block being provided with a mounting hole, the mounting hole being provided with a first protrusion protruding from the inner wall of the mounting hole, the inner wall of the mounting hole being provided with a positioning pin hole, the electrode rod comprising an upper section and a lower section, the lower section being a reduced diameter section, the reduced diameter section being provided with a second protrusion protruding from the circumferential side, a slot being formed between the second protrusion and the upper section, an elastic pin being provided on the circumferential side of the upper section of the electrode rod, when the electrode rod is matched with the heating wire fixing block, the first protrusion is snapped into the slot, and the elastic pin extends into the positioning pin hole.

[0005] Furthermore, in order to facilitate the retraction of the elastic pin when disassembling the heating wire fixing block, a pressing rod is provided in the positioning pin hole and slides along the positioning pin hole. When the elastic pin extends into the positioning pin hole, a part of the pressing rod is pushed out from the positioning pin hole.

[0006] Furthermore, a pin hole spring is provided between the pressing rod and the positioning pin hole, and the pin hole spring enables a portion of the pressing rod to be pushed out of the positioning pin hole.

[0007] Furthermore, when the pressing rod is pushed out from the positioning pin hole, the protruding length of the pressing rod is greater than the protruding length of the elastic pin on the circumferential side of the electrode rod.

[0008] Furthermore, the diameter of the end of the pressing rod facing the mounting hole is larger than the diameter of the head end of the elastic pin.

[0009] Furthermore, the head end of the elastic pin is spherical.

[0010] Furthermore, there are several first bumps, and first grooves are formed between the first bumps. There are several second bumps, and second grooves are formed between the second bumps. The width of the first groove is greater than the width of the second bump, and the width of the second groove is greater than the width of the first bump.

[0011] Compared with the prior art, the advantages of the technical solution provided by the utility model are:

[0012] The utility model adopts a rotary snap connection with an elastic pin for axial locking to realize quick installation and disassembly between the electrode rod and the heating wire fixing block, which can be completed by plugging and pulling out the rotating action, with high operation efficiency, and is suitable for configuration in locations where installation space is limited and screw connection is not suitable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of the electrode rod structure.

[0014] Figure 2 This is a structural diagram of the heating wire fixing block.

[0015] Figure 3 Schematic diagram of the end face structure of the lower section of the electrode rod.

[0016] Figure 4 This is a schematic diagram of the cross-sectional structure of the mounting hole of the heating wire fixing block. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the following embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading this description, various equivalent modifications to this description by those skilled in the art fall within the scope defined by the claims attached to this application.

[0018] Please combine Figures 1 to 4As shown, the quick-release structure of the heating wire fixing block of this embodiment includes an electrode rod 1 and a heating wire fixing block 2. The electrode rod 1 is a round rod comprising an upper section 101 and a lower section 102. The upper section 101 and lower section 102 of the electrode rod 1 can be an inseparable, integral structure or can be combined and connected. The diameter of the upper section 101 is larger than the diameter of the lower section 102, meaning that the lower section 102 is a reduced diameter section. A plurality of protruding second bumps 103 are formed around the circumference of the reduced diameter section of the lower section 102. In this embodiment, there are six second bumps 103, equally distributed around the circumference of the reduced diameter section. However, a plurality of second bumps 103 is not required; only one can achieve the purpose of the present invention. To ensure a more reliable connection, the number of second bumps 103 is generally no less than two. An annular groove 105 is formed between the second bumps 103 and the end surface of the upper section 101 of the electrode rod 1. Second grooves 104 are formed between the second bumps 103.

[0019] An elastic pin 106 is provided around the upper section 101 of the electrode rod 1. Specifically, a transverse through-hole 101a is provided in the upper section 101 of the electrode rod 1. The diameter of the front end of the through-hole 101a is slightly smaller, while the diameter of the rear end is slightly larger. The elastic pin 106 comprises a spring 106a and a pin body 106b. The pin body 106b is T-shaped. After the pin body 106b is inserted into the through-hole 101a, the spring 106a is placed at the rear end of the pin body 106b. The rear end of the through-hole 101a is fixedly sealed by the electrode cover 107. Under the action of the spring 106a, the tip of the pin body 106b protrudes from the circumference of the electrode rod 1. The elastic pin 106 is designed to mate with the positioning pin hole of the heater fixing block 2. To enable the heater fixing block 2 to more easily compress the elastic pin 106, the tip of the pin body 106b is spherical.

[0020] The heating wire fixing block 2 is used to connect the heating wire. The top surface of the heating wire fixing block 2 is provided with a mounting hole 201. The mounting hole 201 is provided with a first protrusion 202 protruding from the inner wall of the mounting hole 201. In this embodiment, there are six first protrusions 202, evenly distributed around the circumference of the mounting hole 201. However, the number of first protrusions 202 is not necessarily multiple, and only one can achieve the purpose of the invention. To make the connection more reliable, the number of first protrusions 202 is generally not less than two. A first groove 203 is formed between the first protrusions 202. In this embodiment, the mounting hole 201 is a blind hole, and a spacing is left between the first protrusion 202 and the bottom surface of the blind hole. This spacing matches the thickness of the second protrusion 103.

[0021] When the electrode rod 1 and the heating wire fixing block 2 are installed, the electrode rod 1 is inserted into the mounting hole 201, the first protrusion 202 passes through the second groove 104 and enters the clamping groove 105, and the corresponding second protrusion 103 passes through the first groove 203 and enters the position between the first protrusion 202 and the bottom surface of the blind hole, and then the heating wire fixing block 2 is rotated for clamping. Therefore, the width of the first groove 203 is greater than the width of the second protrusion 103, and the width of the second groove 104 is greater than the width of the first protrusion 202.

[0022] The inner wall of the mounting hole 201 is also provided with a positioning pin hole 204. When the electrode rod 1 is installed with the heating wire fixing block 2, the elastic pin 106 extends into the positioning pin hole 204 to achieve the purpose of installation and positioning. To facilitate the retraction of the elastic pin 106 when removing the heating wire fixing block 2, the positioning pin hole 204 is configured as a T-shaped hole in this embodiment. The aperture of the positioning pin hole 204 near the inner wall of the mounting hole 201 is smaller. A pressing rod 205 is provided in the positioning pin hole 204, slidingly arranged along the positioning pin hole 204. The middle portion of the pressing rod 205 has a limiting flange 205a. The outer end of the positioning pin hole 204 is covered by a fixing block cover 207. The fixing block cover 207 is provided with a through hole for a portion of the pressing rod 205 to be ejected. In this way, when the elastic pin 106 extends into the positioning pin hole 204, a portion of the pressing rod 205 is ejected from the positioning pin hole 204. In this embodiment, a pinhole spring 206 is provided between the pressing rod 205 and the positioning pin hole 204. The pinhole spring 206 forces a portion of the pressing rod 205 to protrude from the positioning pin hole 204. When the pressing rod 205 protrudes from the positioning pin hole 204, the protruding length of the pressing rod 205 is greater than the protruding length of the elastic pin 106 around the electrode rod 1. The end of the pressing rod 205 facing the mounting hole 201 is the tail end. The diameter of the tail end of the pressing rod 205 is greater than the diameter of the head end of the elastic pin 106. This prevents the tail end of the pressing rod 205 from entering the through-hole 101a of the electrode rod 1 when the pressing rod 205 is pressed, thus preventing the electrode rod 1 from becoming stuck.

[0023] When installing the electrode rod 1 and the heating wire fixing block 2, align the second protrusion 103 with the first groove 203, insert the electrode rod 1 into the mounting hole 201 of the heating wire fixing block 2, and the head end of the elastic pin 106 is squeezed back by the heating wire fixing block 2. After the electrode rod 1 is fully inserted, rotate the heating wire fixing block 2 so that the first protrusion 202 is engaged with the groove 105 of the electrode rod 1. The first protrusion 202 and the second protrusion 103 are positioned opposite each other until the elastic pin 106 is aligned with the positioning pin hole 204. The elastic pin 106 is engaged with the positioning pin hole 204 to complete the installation. When removing, first press the pressing rod 205 to retract the elastic pin 106, then rotate the heating wire fixing block 2 in the opposite direction so that the first protrusion 202 is rotated to the second groove 104 position, and then remove the heating wire fixing block 2.

Claims

1. A quick-release structure for a heating wire fixing block, comprising an electrode rod and a heating wire fixing block, It is characterized in that The heating wire fixing block is provided with a mounting hole, the mounting hole is provided with a first protrusion protruding from the inner wall of the mounting hole, the inner wall of the mounting hole is provided with a positioning pin hole, the electrode rod comprises an upper section and a lower section, the lower section is a reduced diameter section, the reduced diameter section is provided with a second protrusion protruding from the peripheral side, a slot is formed between the second protrusion and the upper section, an elastic pin is provided on the peripheral side of the upper section of the electrode rod, when the electrode rod cooperates with the heating wire fixing block, the first protrusion is inserted into the slot, and the elastic pin extends into the positioning pin hole.

2. The quick-release structure of the heating wire fixing block according to claim 1, It is characterized in that A pressing rod is arranged in the positioning pin hole and is slidably arranged along the positioning pin hole. When the elastic pin is inserted into the positioning pin hole, a part of the pressing rod is pushed out from the positioning pin hole.

3. The quick-release structure of the heating wire fixing block according to claim 2, It is characterized in that A pin hole spring is provided between the pressing rod and the positioning pin hole, and the pin hole spring enables a part of the pressing rod to be pushed out from the positioning pin hole.

4. The quick-release structure of the heating wire fixing block according to claim 2, It is characterized in that When the pressing rod is pushed out from the positioning pin hole, the protruding length of the pressing rod is greater than the protruding length of the elastic pin on the peripheral side of the electrode rod.

5. The quick-release structure of the heating wire fixing block according to claim 2, It is characterized in that The diameter of one end of the pressing rod facing the mounting hole is greater than the diameter of the head end of the elastic pin.

6. The quick-release structure of the heating wire fixing block according to claim 1, It is characterized in that The head end of the elastic pin is a spherical surface.

7. The quick-release structure of the heating wire fixing block according to claim 1, It is characterized in that There are a plurality of first protrusions, and a first groove is formed between the first protrusions. There are a plurality of second protrusions, and a second groove is formed between the second protrusions. The width of the first groove is greater than the width of the second protrusion, and the width of the second groove is greater than the width of the first protrusion.

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