Knob type inductor

Abstract

A knob type inductor comprises a shell, a circuit board, a rotary adjusting piece and a knob handle. The shell comprises a mounting shell with an opening and an end cover, a mounting cavity is formed in the mounting shell, the circuit board is arranged in the mounting cavity, the rotary adjusting part is connected to the circuit board, and the end cover covers the opening; an avoiding hole and a through hole are formed in the protective shell and the mounting shell respectively, an adjusting hole is formed in the rotary adjusting piece, and the avoiding hole, the through hole and the adjusting hole are oppositely arranged; the knob handle comprises an inner handle and an outer handle, the two ends of the inner handle are an inserting part and a first connecting part respectively, the inserting part penetrates through the through hole to be inserted into the adjusting hole, the first connecting part is located in the through hole, the two ends of the outer handle are a second connecting part and a handle respectively, the second connecting part is fixedly connected with the first connecting part, and the handle protrudes out of the protective shell. Compared with the prior art, the knob type inductor is convenient to use, the strength of the protective shell is not affected, and meanwhile damage to the rotary adjusting piece is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of inductor, specifically relates to a knob type inductor. BACKGROUND

[0002] Generally, inductor manufacturers sell various inductors to lamp manufacturers, and the lamp manufacturers install the bought inductors on various lamps for sale to achieve the purpose of intelligently controlling the lamps.

[0003] Taking a human infrared inductor as an example, the human infrared inductor sold by the inductor manufacturer generally comprises an inductor body 6 and a knob handle 4, and the lamp manufacturer sets a protective shell 5 to protect the inductor, and the protective shell is sleeved on the inductor to protect the inductor.

[0004] The existing human infrared inductor is designed into the following three types, the first type is, referring to Figure 1 , the knob handle 4 is recessed on the surface of the inductor body 6, and during the process of assembling the inductor body 6 into the protective shell 5, the inductor body 6 can be easily assembled into the protective shell 5 because the knob handle 4 is recessed on the surface of the inductor body 6, however, the defect is that the consumer needs to use a screwdriver or other tools to rotate the knob when setting the function, and the operation convenience and experience are poor. The second type is, referring to Figure 2 , the knob handle 4 protrudes from the surface of the inductor body 6, and this inductor does not need to use other tools when setting the function, and the knob handle 4 can be directly rotated for adjustment, however, the defect is that the protective shell 5 needs to increase a notch 52 for the knob handle to pass through, which leads to poor strength and appearance of the protective shell 5. The third type is basically the same as the second type, that is, the knob handle 4 protrudes from the surface of the inductor body 6, and the difference is that the protective shell 5 does not need to set the notch 52, and the knob handle is assembled on the inductor body by the lamp manufacturer, and although this type of inductor is also convenient to use, the lamp manufacturer is difficult to align the knob handle with the adjustment hole of the human infrared sensor in the inductor body during the process of assembling the knob handle because it is dark in the inductor body and the lamp manufacturer lacks assembly experience, the operation efficiency is low, and even the knob handle may damage the adjustment hole and damage the sensor, in addition, the connection position of the knob handle and the indication position may not correspond, leading to the problem that the rotation angle and adjustment amount of the knob handle cannot be clearly known during the later use.

[0005] For the third type of sensor, some lighting manufacturers currently provide the protective housing 5 to the sensor manufacturer, who then installs the sensor into the housing. After assembly, the assembled product is delivered to the lighting manufacturer. However, this is very cumbersome due to the need for transporting the protective housing back and forth. Therefore, some lighting manufacturers have the sensor manufacturer manufacture the housing. However, due to the wide variety of lighting products, the shapes and sizes of the sensor protective housings vary from product to product, making it difficult for sensor manufacturers to produce the corresponding protective housings. Utility Model Content

[0006] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a knob-type sensor.

[0007] To achieve the above objectives, the utility model discloses a knob-type sensor, comprising a housing, a circuit board, a rotary adjustment member and a knob handle;

[0008] The housing includes a mounting shell with an opening and an end cover, wherein a mounting cavity is provided in the mounting shell, the circuit board is provided in the mounting cavity, the rotary adjustment member is connected to the circuit board, and the end cover covers the opening;

[0009] The protective shell and the mounting shell are respectively provided with an avoidance hole and a through hole, and the rotary adjustment member is provided with an adjustment hole, and the avoidance hole, the through hole and the adjustment hole are arranged relative to each other;

[0010] The knob handle includes an inner handle and an outer handle, the two ends of the inner handle are respectively a plug-in part and a first connecting part, the plug-in part passes through the through hole and is inserted into the adjustment hole, the first connecting part is located in the through hole, the two ends of the outer handle are respectively a second connecting part and a handle, the second connecting part is fixedly connected to the first connecting part, and the handle protrudes to the outside of the protective shell.

[0011] Preferably, one of the inner handle and the outer handle is provided with a connecting hole, and the other is provided with a connecting rod, and the connecting hole and the connecting rod are interference-connected;

[0012] The first connecting portion is the connecting hole or the connecting rod, and the second connecting portion is the connecting rod or the connecting hole.

[0013] Preferably, the mouth of the connecting hole expands outward to form a flared portion.

[0014] Preferably, a boss is provided on the outer side wall of the end of the inner handle away from the rotary adjustment member, and a mark is provided on the boss.

[0015] Preferably, the outer side wall of the outer handle is provided with a sleeve portion, and the sleeve portion is sleeved on the boss.

[0016] Preferably, the handle is shaped like an arrow.

[0017] Preferably, the outer side wall of the inner handle is provided with a limiting part, and the limiting part is in limiting cooperation with the inner side wall of the mounting shell.

[0018] Preferably, a guide inclined surface is arranged between the limiting part and the outer side wall of the inner handle.

[0019] Preferably, the through hole comprises a containing groove and a containing hole arranged from inside to outside, the bottom of the containing groove is penetrated, a sealing element is arranged in the containing groove, and the first connecting part is located in the containing hole.

[0020] Compared with the prior art, the utility model has the advantages that:

[0021] The knob handle comprises an inner handle and an outer handle, two ends of the inner handle are respectively a plug-in part and a first connecting part, the plug-in part is inserted into the adjusting hole of the rotating adjusting part through the through hole, two ends of the outer handle are respectively a second connecting part and a handle, and the second connecting part is fixedly connected with the first connecting part, so that the outer handle is fixed to the inner handle.

[0022] When the inductor manufacturer assembles the inductor, the inner handle is inserted into the through hole of the mounting shell until the plug-in part is inserted into the adjusting hole of the rotating adjusting part, and the outer handle is temporarily not mounted to the inner handle; when the shell is mounted into the protective shell, since the first connecting part is located in the through hole and the outer handle is not connected to the inner handle, the inner handle and the outer handle do not interfere with the protective shell, so that the assembly of the shell is not affected.

[0023] After all other structures are assembled, the outer handle is connected with the inner handle, and the handle protrudes to the outside of the protective shell, so that the consumer can adjust the knob handle and use conveniently. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a perspective exploded structure schematic view of a human body infrared inductor in the prior art;

[0025] Figure 2 It is a perspective exploded structure schematic view of another human body infrared inductor in the prior art;

[0026] Figure 3 It is a perspective structure schematic view of the knob type inductor in embodiment 1;

[0027] Figure 4 It is Figure 3Schematic diagram of the three-dimensional decomposition structure of the knob-type sensor;

[0028] Figure 5 for Figure 3 A cross-sectional view of a knob-type sensor;

[0029] Figure 6 for Figure 5 A partial enlarged schematic diagram of point A in the middle;

[0030] Figure 7 for Figure 3 Schematic diagram of the three-dimensional structure of the inner handle;

[0031] Figure 8 for Figure 3 Schematic diagram of the three-dimensional structure of the inner and outer handles;

[0032] Figure 9 for Figure 3 Schematic diagram of the three-dimensional decomposition structure of the middle and outer handle from another perspective;

[0033] Figure 10 This is a schematic diagram of the three-dimensional structure of another knob-type sensor in Example 2;

[0034] Figure 11 This is a schematic diagram of the three-dimensional structure of another knob-type sensor in Example 3;

[0035] Figure 12 for Figure 11 Schematic diagram of the three-dimensional decomposition structure of the knob-type sensor;

[0036] Figure 13 for Figure 11 A side view of the knob-type sensor with a printed pattern;

[0037] Figure 14 Schematic diagram of the three-dimensional structure of another knob-type sensor in Example 4

[0038] Figure 15 for Figure 14 Schematic diagram of the three-dimensional decomposition structure of the knob-type sensor;

[0039] Housing 1; mounting shell 11; mounting cavity 111; opening 112; through hole 113; receiving groove 1131; receiving hole 1132; printed pattern 114; end cover 12;

[0040] Circuit board 2;

[0041] Rotating adjustment member 3; adjustment hole 31;

[0042] Knob handle 4; inner handle 41; plug-in part 411; first connecting part 412; flared part 4121; boss 413; mark 4131; limiting part 414; guide inclined surface 415; outer handle 42; second connecting part 421; handle 422; sleeve part 423;

[0043] Protective shell 5; avoiding hole 51; notch 52;

[0044] Sensor main body 6; lens 61. DETAILED DESCRIPTION

[0045] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the utility model will be further described in detail below in combination with the drawings and specific embodiments.

[0046] Embodiment 1

[0047] In order to facilitate the description, the knob type sensor of the embodiment includes a protective shell 5. In practice, the sensor of the embodiment is for the case that the protective shell 5 is manufactured by a lamp manufacturer. The sensor manufacturer provides the sensor to the lamp manufacturer, and the lamp manufacturer assembles the sensor into the protective shell by itself.

[0048] A knob type sensor, referring to Figures 3-9 , comprising a shell 1, a circuit board 2, a rotary adjusting part 3 (preferably a variable resistor), a knob handle 4 and a protective shell 5. The shell 1 comprises a mounting shell 11 with an opening 112 and an end cover 12. The mounting shell 11 is provided with a mounting cavity 111. The circuit board 2 is mounted in the mounting cavity 111 through the opening 112 of the mounting shell 11. The rotary adjusting part 3 is connected to the circuit board 2. The end cover 12 covers the opening 112, and the shell 1 is assembled. After the shell 1 is assembled, the shell 1 is arranged in the protective shell 5. Through the protective shell 5, not only the shell 1 and the electronic devices inside can be protected, but also, for example, the lamp, the protective shell 5 can be designed to be consistent with the appearance and color of the lamp, thereby ensuring the appearance of the product.

[0049] The protective shell 5 and the mounting shell 11 are respectively provided with an avoiding hole 51 and a through hole 113. The rotary adjusting part 3 is provided with an adjusting hole 31. The avoiding hole 51, the through hole 113 and the adjusting hole 31 are oppositely arranged. The knob handle 4 comprises an inner handle 41 and an outer handle 42. The two ends of the inner handle 41 are respectively a plug-in part 411 and a first connecting part 412. The two ends of the outer handle 42 are respectively a second connecting part 421 and a handle 422. When the inner handle 41 is assembled, the plug-in part 411 is inserted into the adjusting hole 31 through the through hole 113. At this time, the first connecting part 412 is located in the through hole 113. When the outer handle 42 is assembled, the second connecting part 421 is fixedly connected with the first connecting part 412. The handle 422 protrudes to the outside of the protective shell 5 for the convenience of consumers.

[0050] In this embodiment, the knob handle 4 is configured as a separate inner handle 41 and outer handle 42. Thus, when assembling the sensor, the sensor manufacturer can first pass the inner handle 41 through the through-hole 113 of the mounting shell 11 until the plug-in portion 411 is plugged into the adjustment hole 31 of the rotary adjustment member 3, while the outer handle 42 is temporarily not installed on the inner handle 41. Subsequently, when the outer shell is installed in the protective shell 5, the first connecting portion 412 is located in the through-hole 113 and the outer handle 42 is not connected to the inner handle 41. This prevents the inner and outer handles 41 and 42 from interfering with the protective shell 5 and affecting the assembly of the housing 1. Since the inner handle 41 is assembled by the sensor manufacturer, this ensures connection reliability and assembly efficiency, greatly reducing the problems of low connection reliability and slow efficiency caused by the inner handle 41 not being able to align with the adjustment hole 31 of the rotary adjustment member 3 or the inner handle 41 damaging the rotary adjustment member 3. After all other components are assembled, the outer handle 42 is connected to the inner handle 41. Once the outer handle 42 is connected to the inner handle 41, the handle 422 protrudes from the outside of the protective shell 5, making it easier for consumers to adjust the knob handle 4 and convenient to use. Furthermore, the outer handle 42 is directly connected to the first connection portion 412 via the second connection portion 421, eliminating the need for the notch 52 in the prior art. This improves the strength and service life of the protective shell 5, while also enhancing the aesthetics of the sensor and improving its market value.

[0051] In order to further prevent the inner handle 41 from not being able to align with the adjustment hole 31 of the rotary adjustment member 3 during the assembly process and the inner handle 41 from damaging the rotary adjustment member 3, in this embodiment, the assembly steps of the knob-type sensor are as follows:

[0052] Step S1, connecting the rotary adjustment member 3 to the circuit board 2, and then installing the circuit board 2 in the installation cavity 111 of the installation shell 11;

[0053] Step S2: Pass the plug-in portion 411 of the inner handle 41 through the through hole 113 until the plug-in portion 411 is inserted into the adjustment hole 31;

[0054] Step S3: Connect the end cover 12 to the mounting housing 11 so that the end cover 12 covers the opening 112 of the mounting cavity 111;

[0055] Step S4: installing the housing 1 assembled in step S3 into the protective shell 5;

[0056] Step S5 : When installing the knob-type sensor, the lamp assembler connects the second connecting portion 421 to the first connecting portion 412 to fix the outer handle 42 to the inner handle 41 , thereby completing the assembly of the knob-type sensor.

[0057] Among them, the inner handle 41 is connected before the end cover 12 is closed. In this way, the docking of the inner handle 41 and the adjustment hole 31 of the rotary adjustment member 3 can be clearly seen through the opening 112 of the mounting shell 11, ensuring that the two can be aligned and accurately plugged in. This can improve the connection accuracy of the inner handle 41, make the position of the inner handle 41 correspond to the position of the adjustment hole 31, and improve the accuracy of use (for example, the function of the knob handle 4 is to adjust the light on time, and the light on time of the adjustment hole 31 is 10s. At this time, the light on time of the position corresponding to the inner handle 41 is 10s. The duration is also 10s), so as to avoid the problem that the position of the inner handle 41 does not correspond to the position of the adjustment hole 31, resulting in the user not knowing the actual lighting duration (for example, the lighting duration of the adjustment hole 31 is 10s, and the lighting duration of the position corresponding to the inner handle 41 is not 10s). In addition, the inner handle 41 is connected before closing the end cover 12. The installation status of the inner handle 41 can be clearly seen through the opening 112 of the mounting shell 11, and the inner handle 41 can be prevented from damaging the rotating adjustment part 3, which greatly improves the yield rate and improves the assembly efficiency.

[0058] In this embodiment, a boss 413 is provided on the outer side wall of the end of the inner handle 41 away from the rotary adjustment member 3, and a mark 4131 is provided on the boss 413. The mark can be aligned with the position of the adjustment hole 31 to ensure the accuracy of the connection, and can also be used for alignment of the outer handle 42 to ensure the accuracy of the connection of the outer handle 42.

[0059] In this embodiment, one of the inner handle 41 and the outer handle 42 is provided with a connecting hole, and the other is provided with a connecting rod. Specifically, the inner handle 41 is provided with a connecting hole with a hexagonal cross-section, and the outer handle 42 is provided with a connecting rod with a cylindrical shape. The connecting hole and the connecting rod are interference-connected. The above interference connection between the connecting rod and the connecting hole achieves a tight fit between the inner handle and the outer handle. Compared with conventional connection methods such as snap-fitting, this has a simple structure, is easy to process and assemble, and can also improve connection reliability. The cylindrical connecting rod is used to match the connecting hole with a hexagonal cross-section, and there are multiple line contacts between the connecting rod and the connecting hole. This is easier to assemble than the connecting rod with a hexagonal cross-section. In addition, the connecting rod can be set with a larger interference fit to ensure a tight fit. In addition, by making full use of the feature of no gap between the interference connection, no virtual position is generated between the outer handle 42 and the inner handle 41. The rotation angle of the outer handle 42 can be accurately transmitted to the inner handle 41, and then to the adjustment hole 31, ensuring the accuracy of rotation adjustment.

[0060] The connecting hole is the first connecting portion 412 , and the connecting rod is the second connecting portion 421 .

[0061] In order to improve the connection reliability between the inner handle and the outer handle and avoid falling off, glue is fixed between the connecting hole and the connecting rod. Of course, in other optional embodiments, the first connecting part and the second connecting part can also be a buckle structure and other conventional connecting structures. However, due to the small actual size of the product, the processing and manufacturing of these connecting structures are difficult, and there will be a virtual position in the use process, which affects the rotation adjustment accuracy and use effect.

[0062] In this embodiment, the mouth of the connecting hole is outwardly expanded to form a flared portion 4121, which facilitates the insertion of the connecting rod into the connecting hole, facilitates assembly, and reduces the connection difficulty caused by interference connection.

[0063] In this embodiment, the outer side wall of the outer handle 42 is provided with a sleeve portion 423 which is sleeved on the boss 413. When the outer handle 42 is connected to the inner handle 41, the sleeve portion 423 of the outer handle 42 is sleeved on the boss 413 of the inner handle 41, and at this time, the end face of the boss 413 and the outer side wall abut against the bottom face and the inner side wall of the sleeve portion 423, which further improves the connection reliability of the inner handle 41 and the outer handle 42, and further reduces the virtual position between the inner handle 41 and the outer handle 42, and improves the adjustment accuracy of the knob handle 4.

[0064] In order to make the inner handle and the outer handle have a unique installation position, prevent relative rotation between the inner handle and the outer handle, and ensure the rotation adjustment effect of the knob handle, the boss of the inner handle has a large size on one side and a small size on the other side. After the sleeve portion is sleeved on the boss, the inner handle and the outer handle can be kept relatively fixed and will not rotate relative to each other, thereby improving the rotation adjustment effect of the knob handle.

[0065] In other embodiments, in order to further avoid the influence of the virtual position, the size of the first connecting part 412 of the inner handle 41 is equal to the size of the adjustment hole, so that the inner handle 41 can be prevented from generating a virtual position with the adjustment hole during rotation. In order to facilitate the insertion of the inner handle into the adjustment hole, the free end of the first connecting part is tapered. Since the rotation adjustment member is not very firm when connected to the circuit board, the inner handle is prone to deformation during insertion into the adjustment hole. Therefore, in this embodiment, there is an assembly gap between the through hole and the inner handle, so that when step S2 is performed, the inner handle can be rotated to move the rotation adjustment member to the initial position, thereby reducing damage to the rotation adjustment member.

[0066] In this embodiment, the handle 422 is in the shape of an arrow, and during the assembly of the outer handle 42, the arrow is aligned with the mark 4131 of the inner handle 41, so that the outer handle 42 can be aligned with the inner handle 41, and finally the accuracy of the position between the knob handle 4 and the adjustment hole 31 is ensured.

[0067] In the embodiment, the outer side wall of the inner handle 41 is provided with a limiting part 414, which is in limiting cooperation with the inner side wall of the mounting shell 11, so that when the inner handle 41 is mounted, the limiting part 414 is limited by the inner side wall of the mounting shell 11, and the inner handle 41 can be prevented from falling off the mounting shell 11.

[0068] In the embodiment, the through hole 113 includes a containing groove 1131 and a containing hole 1132 arranged from inside to outside, the bottom of the containing groove 1131 is penetrated, a sealing element is arranged in the containing groove 1131, which can improve the waterproof performance, and the first connecting part 412 is located in the containing hole 1132, which avoids the interference caused by the exposure of the first connecting part 412 to the mounting shell 11 during the process of mounting the shell body 1 into the protective shell 5.

[0069] The size of the through hole at the bottom of the containing groove 1131 is smaller than the cross-sectional size of the limiting part 414, and the limiting part 414 is difficult to pass through this position, so in the embodiment, a guide inclined surface 415 is arranged between the limiting part 414 and the outer side wall of the inner handle 41, and through the arrangement of the guide inclined surface 415, the inner handle 41 can easily pass through the through hole at the bottom of the containing groove 1131 during assembly, which is convenient for assembly.

[0070] Embodiment 2

[0071] A rotary knob type inductor, the structure of the rotary knob handle in the embodiment is basically the same as that of embodiment 1, and the difference is that, as shown in Figure 10 , the number of the rotary knob handle 4 is 1, of course, the number of the rotary knob handle 4 can also be multiple, which can be set as needed.

[0072] When the rotary knob handle 4 has multiple rotary knob handles, the positions of the multiple rotary knob handles can be distributed as needed, for example Figure 3 , two rotary knob handles are arranged in the vertical direction, or two rotary knob handles are distributed in the circumferential direction of the protective shell 5.

[0073] Embodiment 3

[0074] A rotary knob type inductor, the structure of the rotary knob handle in the embodiment is basically the same as that of embodiment 1, and the difference is that, in embodiment 1, two rotary knob handles 4 pass through the protective shell through two avoiding holes 51, and in this inductor, the printed pattern is printed on the protective shell by the lamp manufacturer, since the rotary knob handle and the printed pattern are manufactured and assembled by the inductor manufacturer and the lamp manufacturer respectively, the position accuracy between the rotary knob handle and the pattern indicating position is not high.

[0075] As shown in Figures 11-13 , the position opposite to the inductor lens 61 on the protective shell is a groove, and in this scheme, the printed pattern 114 is printed on the shell body of the inductor and exposed through the above-mentioned groove. Since the rotary knob handle and the pattern are processed by the inductor manufacturer, the position accuracy between the rotary knob handle and the pattern indicating position can be improved, and the use experience can be improved.

[0076] Embodiment 4

[0077] A knob type inductor, the structure of the knob handle of the embodiment is basically same as that of embodiment 1, the difference is that, in embodiment 1, the inductor is in a cylindrical shape, in the embodiment, referring to Figures 14-15 , the inductor is in a square box shape.

[0078] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not the limitation to the embodiments of the utility model. For the ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A knob-type sensor, characterized in that: It includes a housing, a circuit board, a rotary adjustment member and a knob handle; The housing includes a mounting shell with an opening and an end cover, wherein a mounting cavity is provided in the mounting shell, the circuit board is provided in the mounting cavity, the rotary adjustment member is connected to the circuit board, and the end cover covers the opening; The mounting shell is provided with a through hole, the rotary adjustment member is provided with an adjustment hole, and the through hole and the adjustment hole are arranged opposite to each other; The knob handle includes an inner handle and an outer handle, the two ends of the inner handle are respectively a plug-in part and a first connecting part, the plug-in part passes through the through hole and is inserted into the adjustment hole, the first connecting part is located in the through hole, the two ends of the outer handle are respectively a second connecting part and a handle, the second connecting part is fixedly connected to the first connecting part, and the handle protrudes to the outside of the protective shell.

2. The knob-type sensor according to claim 1, characterized in that: One of the inner handle and the outer handle is provided with a connecting hole, and the other is provided with a connecting rod, and the connecting hole and the connecting rod are interference-connected; The first connecting portion is the connecting hole or the connecting rod, and the second connecting portion is the connecting rod or the connecting hole.

3. The knob-type sensor according to claim 2, characterized in that: The mouth of the connecting hole expands outward to form a flared portion.

4. The knob-type sensor according to claim 2, characterized in that: A boss is provided on the outer side wall of the end of the inner handle away from the rotary adjustment member, and a mark is provided on the boss.

5. The knob-type sensor according to claim 4, characterized in that: The outer side wall of the outer handle is provided with a sleeve portion, and the sleeve portion is sleeved on the boss.

6. The knob-type sensor according to claim 2, characterized in that: The handle is in the shape of an arrow.

7. The knob-type sensor according to claim 1, characterized in that: The outer side wall of the inner handle is provided with a limiting portion, and the limiting portion is limitedly matched with the inner side wall of the mounting shell.

8. The knob-type sensor according to claim 7, characterized in that: A guiding slope is provided between the limiting portion and the outer side wall of the inner handle.

9. The knob-type sensor according to claim 1, characterized in that: The through hole includes a receiving groove and a receiving hole arranged from the inside to the outside, the bottom of the receiving groove passes through, a sealing member is provided in the receiving groove, and the first connecting portion is located in the receiving hole.

Images