Glue injection needle and hot melt gutta-percha gun

Abstract

The present invention relates to the field of medical devices, and in particular, to a glue injection needle and a hot melt dental glue gun. A glue injection needle, comprising a hot glue tube body, a connecting nut and a needle assembly. The connecting nut is connected to the distal end of the hot glue tube body, and the connecting nut is provided with a mounting hole, which penetrates the connecting nut from the distal end to the proximal end of the hot glue tube body. The needle assembly is provided with a hot glue channel, and at least part of the needle assembly is rotatably arranged in the mounting hole, and the hot glue channel is connected to the inner cavity of the hot glue tube body. The glue injection needle can improve the reliability of needle rotation, thereby avoiding the situation where the needle falls off.

Description

Technical Field

[0001] The invention relates to the field of medical devices, and in particular to a glue injection needle and a hot-melt gutta-percha gun. Background Art

[0002] The traditional way of using a hot melt gutta-percha gun is to put the gutta-percha into the gutta-percha inlet and use the push rod to push it into the metal heating chamber. After the gutta-percha is heated and melted, it is squeezed into the injection needle assembly, and then from the tiny needle tube to the root canal for filling. During the treatment, the needle is required to rotate.

[0003] However, in the prior art, the needle is often rotated relative to the needle sleeve. This rotation method will make the force of the needle rotation uneven and produce sudden change force, thereby making the rotation reliability of the needle low. Summary of the invention

[0004] The object of the present invention is to provide a glue injection needle and a hot-melt gutta-percha gun, which can improve the reliability of needle rotation, thereby avoiding the situation where the needle falls off.

[0005] The embodiment of the present invention is achieved as follows:

[0006] In a first aspect, an embodiment provides a glue injection needle, the glue injection needle comprising a hot glue tube body, a connecting nut and a needle assembly;

[0007] The connecting nut is connected to the distal end of the thermal glue tube body, and the connecting nut is provided with a mounting hole, which penetrates the connecting nut in a direction from the distal end to the proximal end of the thermal glue tube body;

[0008] The needle assembly is equipped with a hot glue channel, at least part of the needle assembly is rotatably arranged in the mounting hole, and the hot glue channel is communicated with the inner cavity of the hot glue tube body.

[0009] In an optional embodiment, along the direction from the distal end to the proximal end of the connecting nut, the outer peripheral surface of the connecting nut is provided with a protrusion and an external thread in sequence;

[0010] The outer diameter of the raised portion is greater than the outer diameter of the external thread, the external thread is threadedly connected to the inner cavity wall of the thermal rubber tube body, and one end of the raised portion close to the external thread abuts against the thermal rubber tube body.

[0011] In an optional embodiment, the protrusion is an annular protrusion arranged around the distal end to the proximal end of the connecting nut;

[0012] The glue injection needle also includes a gasket, which is arranged between the raised portion and the abutting surface of the hot glue tube body.

[0013] In an optional embodiment, the injection needle also includes a damping ring; the damping ring is located between the abutting surfaces of the connecting nut and the needle assembly, and is simultaneously pressed against the needle assembly and the connecting nut to provide damping for the rotation of the needle assembly relative to the mounting hole.

[0014] In an optional embodiment, a proximal end or a distal end of the connecting nut is provided with an annular groove communicating with the mounting hole;

[0015] The annular groove and the needle assembly together define an annular space for installing the damping ring.

[0016] In an optional embodiment, the needle assembly includes a needle sleeve and a needle body;

[0017] The needle sleeve extends into the mounting hole from the distal end of the connecting nut and is rotatably connected to the mounting hole;

[0018] Along the direction from the distal end to the proximal end of the connecting nut, the needle sleeve is provided with a first through hole, and the needle body is provided with a second through hole;

[0019] Part of the needle body cooperates with the first through hole, the rest of the needle body extends out of the first through hole from the distal end of the needle sleeve, and the movement of the needle body relative to the axial direction of the first through hole is restricted;

[0020] The first through hole and the second through hole together form a thermal glue channel.

[0021] In an optional embodiment, the needle assembly further comprises a guide sleeve, and the guide sleeve is configured with a third through hole along the distal to proximal direction of the connecting nut;

[0022] The portion of the needle sleeve located outside the distal end of the connecting nut is provided with an annular boss, and the annular boss abuts against the connecting nut;

[0023] One end of the guide sleeve extends from the proximal end of the needle sleeve into the first through hole and is interference fit with the inner wall of the first through hole, and the end of the guide sleeve extending into the first through hole is tightly abutted against the end of the needle body, and the other end of the guide sleeve is located outside the first through hole and abuts against the proximal end of the connecting nut;

[0024] The second through hole and the third through hole together form a thermal glue channel.

[0025] In an optional embodiment, the distal end of the connecting nut is provided with an annular groove communicating with the mounting hole;

[0026] The annular boss is arranged around the connecting nut in the direction from the distal end to the proximal end, and the annular boss and the annular groove jointly define an annular space for installing the damping ring.

[0027] In an optional embodiment, the first through hole includes a first hole portion and a second hole portion sequentially arranged from the proximal end to the distal end of the connecting nut;

[0028] The inner diameter of the first hole portion is greater than the inner diameter of the second hole portion, and a transition slope is provided at the connection between the first hole portion and the second hole portion;

[0029] The portion of the needle body located in the first through hole cooperates with the second hole portion and the transition slope at the same time;

[0030] One end of the guide sleeve located in the first through hole extends into the first hole portion and has an interference fit with the inner wall of the first hole portion; and one end of the guide sleeve extending into the first hole portion is tightly pressed against the needle body to limit the movement of the needle body along the proximal end to the distal end of the connecting nut.

[0031] In a second aspect, an embodiment provides a hot melt gutta-percha gun, the hot melt gutta-percha gun comprising a push rod and the above-mentioned glue injection needle;

[0032] The push rod extends from the proximal end of the hot glue tube body into the inner cavity of the hot glue tube body and is movably connected with the inner cavity of the hot glue tube body.

[0033] The beneficial effects of the embodiments of the present invention include:

[0034] The glue injection needle comprises a hot glue tube body, a connecting nut and a needle assembly. Among them, at least part of the needle assembly is rotatably arranged in the mounting hole, and the needle assembly is provided with a hot glue channel connected to the inner cavity of the hot glue tube body. Therefore, through the rotatable connection between the needle assembly and the connecting nut, when the needle assembly is rotated, the rotational connection between the needle assembly and the connecting nut can improve the uniformity of the rotational force, so as to avoid the situation of uneven force causing sudden force, thereby effectively improving the rotation reliability of the glue injection needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 This is a schematic diagram of the structure of the glue injection needle in an embodiment of the present invention;

[0037] Figure 2 is a cross-sectional view of a glue injection needle in an embodiment of the present invention;

[0038] Figure 3 This is a schematic diagram of the structure of a connecting nut in an embodiment of the present invention;

[0039] Figure 4 It is a schematic diagram of the structure of the needle assembly in an embodiment of the present invention;

[0040] Figure 5is an exploded schematic diagram of a needle assembly in an embodiment of the present invention;

[0041] Figure 6 is a cross-sectional view of a needle assembly according to an embodiment of the present invention;

[0042] Figure 7 is a cross-sectional view of a needle assembly according to an embodiment of the present invention;

[0043] Figure 8 Schematic diagram of the structure of the needle sleeve in the embodiment of the present invention.

[0044] Icons: 100-glue injection needle; 110-hot glue tube body; 120-connecting nut; 130-needle assembly; 121-mounting hole; 131-hot glue channel; 111-inner cavity; 122-protrusion; 123-external thread; 140-washer; 150-damping ring; 124-annular groove; 125-annular space; 132-needle sleeve; 133-needle body; 1321-first through hole; 1331-second through hole; 134-guide sleeve; 1341-third through hole; 1322-annular boss; 1323-first hole portion; 1324-second hole portion; 1325-transition slope. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0046] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0048] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0049] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0050] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] Please refer to Figure 1 and Figure 2 , Figure 1 and Figure 2 The structure of the glue injection needle in the embodiment of the present invention is shown. This embodiment provides a glue injection needle 100 , which includes a hot glue tube body 110 , a connecting nut 120 and a needle assembly 130 .

[0052] The connecting nut 120 is connected to the distal end of the thermal rubber tube body 110 , and the connecting nut 120 is provided with a mounting hole 121 , which penetrates the connecting nut 120 in a direction from the distal end to the proximal end of the thermal rubber tube body 110 .

[0053] The needle assembly 130 is provided with a hot glue channel 131 . At least a portion of the needle assembly 130 is rotatably disposed in the mounting hole 121 , and the hot glue channel 131 is communicated with the inner cavity 111 of the hot glue tube body 110 .

[0054] The working principle of the glue injection needle 100 is:

[0055] The glue injection needle 100 includes a hot glue tube body 110, a connecting nut 120 and a needle assembly 130. Among them, at least part of the needle assembly 130 is rotatably arranged in the mounting hole 121, and the needle assembly 130 is provided with a hot glue channel 131 connected to the inner cavity 111 of the hot glue tube body 110. Therefore, through the rotatable connection between the needle assembly 130 and the connecting nut 120, when the needle assembly 130 is rotated, the rotational force uniformity can be improved through the rotational connection between the needle assembly 130 and the connecting nut 120, so as to avoid the situation of uneven force and sudden force, thereby effectively improving the rotation reliability of the glue injection needle 100.

[0056] Please refer to Figure 1-Figure 3 , Figure 3 The structure of the connecting nut in the embodiment of the present invention is shown. In this embodiment, when the connecting nut 120 is set, in order to facilitate the connection between the connecting thread and the hot glue tube body 110, the outer peripheral surface of the connecting nut 120 is sequentially provided with a protrusion 122 and an external thread 123 along the distal end to the proximal end of the connecting nut 120; wherein the outer diameter of the protrusion 122 is greater than the outer diameter of the external thread 123. Thus, part of the connecting nut 120 is extended into the inner cavity 111 of the hot glue tube body 110, and it is threadedly connected with the inner cavity 111 wall of the hot glue tube body 110 through the external thread 123 on the connecting nut 120, and the end of the protrusion 122 close to the external thread 123 abuts against the hot glue tube body 110, thereby limiting the installation position of the connecting nut 120 and the hot glue tube body 110, so as to facilitate the installation of the needle assembly 130 and the communication between the hot glue channel 131 and the hot glue tube body 110.

[0057] Please refer to Figure 4-Figure 7 , Figure 4-Figure 7 The structure of the needle assembly in the embodiment of the present invention is shown. When the protrusion 122 is provided, its function is to position and install the connecting nut 120, so when the protrusion 122 is provided, it can be an annular protrusion provided in the direction from the distal end to the proximal end of the connecting nut 120; and the injection needle 100 also includes a washer 140, which is provided between the protrusion 122 and the abutting surface of the hot glue tube body 110.

[0058] For further information, please refer to Figure 4-Figure 7 In this embodiment, the injection needle 100 also includes a damping ring 150; the damping ring 150 is located between the abutting surfaces of the connecting nut 120 and the needle assembly 130, and is simultaneously pressed against the needle assembly 130 and the connecting nut 120 to provide damping for the rotation of the needle assembly 130 relative to the mounting hole 121.

[0059] Therefore, the setting of the damping ring 150 can limit the rotation of the needle assembly 130, so that when the needle assembly 130 is rotated, the needle assembly 130 needs to be driven by an external force to overcome the friction force between the damping ring 150 and the contact surface between the connecting nut 120 and the needle assembly 130, so as to avoid unnecessary rotation of the needle assembly 130, and can assist in maintaining the relative position between the needle assembly 130 and the connecting nut 120, thereby improving the reliability of the injection needle 100.

[0060] For further information, please refer to Figure 3-Figure 7 In order to facilitate the installation of the damping ring 150, an annular groove 124 for installing the damping ring 150 is provided on the connecting nut 120. The annular groove 124 has a shape adapted to the damping ring 150, so that when the connecting nut 120 and the needle assembly 130 are assembled, the damping ring 150 can be pressed against the connecting nut 120 and the needle assembly 130 at the same time, thereby increasing the friction force. In addition, when the annular groove 124 is provided, the annular groove 124 can be provided at the proximal end or the distal end of the connecting nut 120. And when the annular groove 124 is set, since the needle assembly 130 cooperates with the mounting hole 121, in order to make the needle assembly 130 that cooperates with the mounting hole 121 able to press against the damping ring 150, when the annular groove 124 is set, the annular groove 124 is connected with the mounting hole 121, so that the annular groove 124 and the end of the mounting hole 121 form a stepped hole, and then when the damping ring 150 and the needle assembly 130 are both matched with the mounting hole 121, the annular groove 124 and the needle assembly 130 jointly define the annular space 125 for installing the damping ring 150, so that the damping ring 150 installed in the annular space 125 can be pressed against the connecting nut 120 and the needle assembly 130 at the same time, thereby forming rotational damping.

[0061] In this embodiment, please refer to Figure 4-Figure 7 The needle assembly 130 includes a needle sleeve 132 and a needle body 133. The needle sleeve 132 extends from the distal end of the connection nut 120 into the mounting hole 121 and is rotatably connected to the mounting hole 121. Along the direction from the distal end to the proximal end of the connection nut 120, the needle sleeve 132 is provided with a first through hole 1321, and the needle body 133 is provided with a second through hole 1331. The axis of the first through hole 1321 and the second through hole 1331 coincide. Part of the needle body 133 cooperates with the first through hole 1321, and the rest of the needle body 133 extends from the distal end of the needle sleeve 132 out of the first through hole 1321. The needle body 133 located in the first through hole 1321 is tightly pressed against the first through hole 1321, so that the movement of the needle body 133 relative to the axis direction of the first through hole 1321 is limited. The first through hole 1321 and the second through hole 1331 together form a hot glue channel 131 for hot glue output.

[0062] For further information, please refer to Figure 1-Figure 8, Figure 8 The structure of the needle sleeve in the embodiment of the present invention is shown. In this embodiment, the needle assembly 130 further includes a guide sleeve 134, and the guide sleeve 134 is provided with a third through hole 1341 along the direction from the distal end to the proximal end of the connecting nut 120, and the hole axis of the third through hole 1341 coincides with the hole axis of the second through hole 1331. In addition, the portion of the needle sleeve 132 located outside the distal end of the connecting nut 120 is provided with an annular boss 1322, and the annular boss 1322 abuts against the connecting nut 120; so as to limit the movement of the needle sleeve 132 from the distal end of the connecting nut 120 to the proximal end of the connecting nut 120 through the abutment between the annular boss 1322 and the connecting nut 120.

[0063] Secondly, one end of the guide sleeve 134 extends from the proximal end of the needle sleeve 132 into the first through hole 1321 and has an interference fit with the inner wall of the first through hole 1321, and the end of the guide sleeve 134 extending into the first through hole 1321 is tightly pressed against the end of the needle body 133, and the other end of the guide sleeve 134 is located outside the first through hole 1321 and abuts against the proximal end of the connecting nut 120.

[0064] Therefore, when the needle body 133 cooperates with the needle sleeve 132, since the needle body 133 is fixed relative to the needle sleeve 132, and the annular boss 1322 limits the movement of the needle sleeve 132 from the distal end of the connecting nut 120 to the proximal end of the connecting nut 120, and the guide sleeve 134 limits the movement of the needle sleeve 132 from the proximal end of the connecting nut 120 to the distal end of the connecting nut 120, the needle sleeve 132 is fixedly connected to the connecting nut 120, thereby being able to maintain the installation position of the needle assembly 130 relative to the connecting nut 120.

[0065] In addition, when the guide sleeve 134 is provided, the portion of the guide sleeve 134 extending into the first through hole 1321 is pressed against the needle body 133, so that the needle body 133 is pressed against the needle sleeve 132, and then the hot glue channel 131 is formed by the second through hole 1331 and the third through hole 1341. In other embodiments of the present invention, if the guide sleeve 134 extending into the first through hole 1321 is not pressed against the needle body 133, and the needle body 133 is pressed against the first through hole 1321 of the needle sleeve 132 by other means, and the portion of the guide sleeve 134 located in the first through hole 1321 is spaced from the needle body 133, then the hot glue channel 131 is formed by the first through hole 1321, the second through hole 1331 and the third through hole 1341.

[0066] Further, in this embodiment, please refer to Figure 3-Figure 8In order to install the damping ring 150, the distal end of the connecting nut 120 is provided with an annular groove 124 communicating with the mounting hole 121; the annular boss 1322 is arranged around the distal end to the proximal end of the connecting nut 120, and the annular boss 1322 and the annular groove 124 jointly define an annular space 125 for installing the damping ring 150. And the annular space 125 is adapted to the size of the damping ring 150, so that when the damping ring 150 is assembled in the annular space 125, the damping can contact the connecting nut 120 and the needle sleeve 132 at the same time to form friction damping.

[0067] In this embodiment, please refer to Figure 4-Figure 8 When configuring the first through hole 1321, the first through hole 1321 includes a first hole portion 1323 and a second hole portion 1324 sequentially arranged along the proximal to distal direction of the connection nut 120; wherein the inner diameter of the first hole portion 1323 is greater than the inner diameter of the second hole portion 1324, and a transition slope 1325 is arranged at the connection between the first hole portion 1323 and the second hole portion 1324. The portion of the needle body 133 located in the first through hole 1321 cooperates with the second hole portion 1324 and the transition slope 1325 at the same time to improve the sealing of the hot glue channel 131 to avoid glue leakage.

[0068] Secondly, one end of the guide sleeve 134 located in the first through hole 1321 extends into the first hole portion 1323 and has an interference fit with the inner wall of the first hole portion 1323; and one end of the guide sleeve 134 extending into the first hole portion 1323 is tightly pressed against the needle body 133 to limit the movement of the needle body 133 from the proximal end to the distal end of the connecting nut 120.

[0069] Based on the above-mentioned glue injection needle 100, an embodiment provides a hot melt gutta-percha gun, which includes a push rod and the above-mentioned glue injection needle 100; a portion of the push rod extends from the proximal end of the hot glue tube body 110 into the inner cavity 111 of the hot glue tube body 110, and is movably connected to the inner cavity 111 of the hot glue tube body 110.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A glue injection needle, Features: The glue injection needle comprises a hot glue tube body, a connecting nut and a needle assembly; The connecting nut is connected to the distal end of the thermal rubber tube body, and the connecting nut is provided with a mounting hole, and the mounting hole penetrates the connecting nut in a direction from the distal end to the proximal end of the thermal rubber tube body; The needle assembly is provided with a hot glue channel, at least a portion of the needle assembly is rotatably disposed in the mounting hole, and the hot glue channel is in communication with the inner cavity of the hot glue tube body; Along the direction from the distal end to the proximal end of the connecting nut, the outer peripheral surface of the connecting nut is provided with a protrusion and an external thread in sequence; The outer diameter of the protrusion is greater than the outer diameter of the external thread, the external thread is threadedly connected to the inner cavity wall of the thermal rubber tube body, and one end of the protrusion close to the external thread abuts against the thermal rubber tube body; The needle assembly comprises a needle sleeve and a needle body; The needle sleeve extends into the mounting hole from the distal end of the connecting nut and is rotatably connected to the mounting hole; Along the direction from the distal end to the proximal end of the connecting nut, the needle sleeve is configured with a first through hole, and the needle body is configured with a second through hole; Part of the needle body cooperates with the first through hole, the rest of the needle body extends out of the first through hole from the distal end of the needle sleeve, and the movement of the needle body relative to the axial direction of the first through hole is restricted; The first through hole and the second through hole together form the thermal glue channel.

2. The glue injection needle according to claim 1, Features: The protrusion is an annular protrusion arranged around the connecting nut from the distal end to the proximal end; The glue injection needle also includes a gasket, which is arranged between the protruding portion and the abutting surface of the thermal glue tube body.

3. The glue injection needle according to claim 1, Features: The injection needle also includes a damping ring; the damping ring is located between the abutting surfaces of the connecting nut and the needle assembly, and is simultaneously pressed against the needle assembly and the connecting nut to provide damping for the rotation of the needle assembly relative to the mounting hole.

4. The glue injection needle according to claim 3, Features: The proximal end or the distal end of the connecting nut is provided with an annular groove communicating with the mounting hole; The annular groove and the needle assembly together define an annular space in which the damping ring is installed.

5. The glue injection needle according to claim 1, Features: The needle assembly further comprises a guide sleeve, which is provided with a third through hole along the distal to proximal direction of the connection nut; The portion of the needle sleeve located outside the distal end of the connecting nut is provided with an annular boss, and the annular boss abuts against the connecting nut; One end of the guide sleeve extends from the proximal end of the needle sleeve into the first through hole and is interference fit with the inner wall of the first through hole, and the end of the guide sleeve extending into the first through hole is tightly abutted against the end of the needle body, and the other end of the guide sleeve is located outside the first through hole and abuts against the proximal end of the connecting nut; The second through hole and the third through hole together form the thermal glue channel.

6. The glue injection needle according to claim 5, Features: The distal end of the connecting nut is provided with an annular groove communicating with the mounting hole; The annular boss is arranged around the connecting nut in a direction from the distal end to the proximal end, and the annular boss and the annular groove together define an annular space for installing a damping ring.

7. The glue injection needle according to claim 5, Features: The first through hole comprises a first hole portion and a second hole portion sequentially arranged along a direction from a proximal end to a distal end of the connecting nut; The inner diameter of the first hole portion is greater than the inner diameter of the second hole portion, and a transition slope is provided at the connection between the first hole portion and the second hole portion; The portion of the needle body located in the first through hole cooperates with the second hole portion and the transition slope at the same time; One end of the guide sleeve located in the first through hole extends into the first hole portion and has an interference fit with the inner wall of the first hole portion; and one end of the guide sleeve extending into the first hole portion is tightly pressed against the needle body to limit the movement of the needle body along the proximal end to the distal end of the connecting nut.

8. A hot melt gum gun, Features: The hot melt gutta-percha gun comprises a push rod and a glue injection needle as claimed in any one of claims 1 to 7; Part of the push rod extends from the proximal end of the thermal rubber tube body into the inner cavity of the thermal rubber tube body and is movably connected to the inner cavity of the thermal rubber tube body.

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