LED tube lamp

Abstract

The LED tubular lamp comprises a lamp shell, a light-emitting assembly and a driving power source, the light-emitting assembly and the driving power source are arranged in the lamp shell, the light-emitting assembly comprises a substrate and LED lamp beads arranged on the substrate, the driving power source comprises a circuit board and electronic components arranged on the circuit board, and the circuit board is basically parallel to the substrate. The lamp shell comprises a lamp tube and lamp caps arranged at the two ends of the lamp tube, each lamp cap comprises an end wall and a barrel wall connected to the end of the lamp tube in a sleeving mode, and the end walls are provided with conductive pieces used for being connected with an external power source and electrically connected with the driving power source. The blocking part abuts against the circuit board to limit the circuit board to move in the direction away from the lamp tube, the bearing part extends inwards from the blocking part to be attached to the circuit board, the bearing part is provided with a buckle, and the circuit board is provided with a buckle hole matched with the buckle. And the circuit board is fixed on the lamp holder by the buckles of the bearing part and the circuit board through clamping fit. And when the LED tube lamp is assembled, the driving power supply is mounted along with the lamp holder, so that the assembling convenience is improved.

Description

Technical Field

[0001] The present application relates to the technical field of lighting fixtures, and in particular to an LED tube lamp. Background Art

[0002] Traditional lighting equipment usually uses tubular fluorescent lamps. After the popularization of LED lamps, the historical usage habits are still followed, and LED tube lamps are used to replace traditional tubular fluorescent lamps. LED tube lamps include a lamp housing and a light-emitting component inside the lamp housing. The light-emitting component includes a substrate and LED lamp beads. When in use, the AC current of the mains is converted into a current that can directly power the light-emitting component through a driving power supply.

[0003] The lamp housing of the LED tube lamp includes a lamp tube and lamp holders arranged at both ends of the lamp tube. When assembling the LED tube lamp, the installed driving power supply is blocked by the lamp tube, and it is not easy to fix the driving power supply in the lamp tube. Utility Model Content

[0004] Based on this, it is necessary to provide an LED tube lamp to address the above technical problems.

[0005] The LED tube lamp of the present application includes a lamp housing, and a light-emitting component and a driving power supply arranged inside the lamp housing, the light-emitting component includes a substrate and LED lamp beads arranged on the substrate, the driving power supply includes a circuit board and electronic components arranged on the circuit board, the circuit board is basically parallel to the substrate, the lamp housing includes a lamp tube and a lamp holder arranged at both ends of the lamp tube, the lamp holder includes an end wall and a barrel wall sleeved on the end of the lamp tube, the end wall is provided with a conductive member for connecting to an external power supply and electrically connecting to the driving power supply, the interior of the lamp holder is provided with a blocking portion that abuts the circuit board to limit its movement away from the lamp tube, and a bearing portion extending inward from the blocking portion to abut against the circuit board, the bearing portion is provided with a buckle, and the circuit board is provided with a buckle hole that cooperates with the buckle.

[0006] Several optional methods are also provided below, but they are not intended to be additional limitations on the above-mentioned overall solution, but are merely further supplements or preferences. Under the premise that there are no technical or logical contradictions, each optional method can be combined with the above-mentioned overall solution separately, and multiple optional methods can also be combined.

[0007] Optionally, the bearing portion is provided with two oppositely arranged slots, the circuit board partially extends into a space defined by the two slots, and two side edges of the local circuit board cooperate with the slots.

[0008] Optionally, the blocking portion is formed by a partition extending radially on the inner side of the cylinder wall, and the partition is provided with a wire hole for the power supply wire to pass through.

[0009] Optionally, the electronic component includes a switch element having a driving part, the circuit board has a back side facing the substrate, and a front side provided with the switch element, and the lamp tube is provided with an avoidance hole corresponding to exposing the driving part.

[0010] Optionally, the substrate is overlapped and matched with the circuit board, and the backlight surface of the substrate is provided with a first connector electrically connected to the LED lamp bead, and the end of the circuit board away from the lamp holder is provided with a second connector plugged and matched with the first connector.

[0011] Optionally, the lamp holder comprises a fixed seat and a rotating seat which can rotate relative to each other around an axis and can move relative to each other in the axial direction, the fixed seat is used to connect the lamp tube, the rotating seat has the end wall on which the conductive member is arranged, and the fixed seat has the barrel wall sleeved on the end of the lamp tube;

[0012] An angle adjustment mechanism is arranged between the fixed seat and the rotating seat, and the angle adjustment mechanism includes a plurality of circumferentially arranged latching teeth provided on one of the fixed seat and the rotating seat and a positioning piece provided on the other, and a gear groove cooperating with the positioning piece is formed between adjacent latching teeth, and the other is also provided with a limiting piece cooperating with the outermost latching teeth to limit the rotation range of the fixed seat and the rotating seat.

[0013] Optionally, the extension length of the limiting member is greater than the extension length of the positioning member, so that when the positioning member is separated from the gear slot, the latch tooth maintains the restriction on the limiting member.

[0014] Optionally, an anti-slip structure for limiting axial separation of the fixed seat and the rotating seat is provided between the fixed seat and the rotating seat, and the anti-slip structure allows the maximum stroke of relative movement of the fixed seat and the rotating seat to be smaller than the stroke of the limiting member disengaging from the locking tooth.

[0015] Optionally, the end wall has a connecting column extending axially inward, the blocking portion is provided with a hole column extending axially toward the end wall, the connecting column and the hole column are socketed with each other, and an elastic member is provided therebetween for acting on the fixed seat and the rotating seat so that the two have a tendency to approach each other axially.

[0016] Optionally, the anti-slip structure includes a limiting step arranged on the inner surface of the hole column and an anti-slip part connected to the connecting column, the anti-slip part has an expanded diameter end with a diameter larger than the hole of the hole column, and the elastic part abuts between the expanded diameter end and the limiting step.

[0017] The LED tube lamp of this application has at least the following technical effects:

[0018] The bearing part of the present application abuts against the circuit board to limit the circumferential shaking of the circuit board, and the buckle of the bearing part and the circuit board are snap-fitted to fix the circuit board to the lamp holder. When assembling the LED tube lamp, the driving power supply can be snap-fitted to the lamp holder. When the lamp holder is connected and fixed to the lamp tube, the driving power supply is installed along with the lamp holder, which improves the convenience of assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of an LED tube lamp in an embodiment of the present application;

[0020] Figure 2 This is a partial cross-sectional schematic diagram of an LED tube lamp in an embodiment of the present application;

[0021] Figure 3 for Figure 2 A magnified view of part A;

[0022] Figure 4 for Figure 2 A magnified view of part B;

[0023] Figure 5 This is a schematic diagram of the assembly of an LED tube lamp in one embodiment of the present application;

[0024] Figure 6 This is a schematic diagram of the assembly of an LED tube lamp in one embodiment of the present application;

[0025] Figure 7 This is a schematic diagram of the assembly process of the lamp holder and the driving power supply of the LED tube lamp in one embodiment of the present application;

[0026] Figure 8 This is a schematic diagram of the assembly result of the lamp holder and the driving power supply of the LED tube lamp in one embodiment of the present application;

[0027] Fig. 9 This is a cross-sectional schematic diagram of an LED tube lamp in an embodiment of the present application;

[0028] Fig.10 This is a schematic diagram of the matching relationship between the driving power supply and the substrate in one embodiment of the present application;

[0029] Fig.11 This is a schematic diagram of the assembly of a lamp holder of an LED tube lamp in one embodiment of the present application;

[0030] Fig.12 for Fig.11 Schematic diagram from another angle;

[0031] Fig.13 This is a schematic diagram of the assembly of an LED tube lamp in one embodiment of the present application.

[0032] The reference numerals in the figures are described as follows:

[0033] 100, lamp tube; 110, snap-fit ​​structure; 120, avoidance hole; 130, dial switch; 200, lamp holder; 201, end wall; 202, cylinder wall; 203, conductive member;

[0034] 210, partition; 211, blocking portion; 212, wire hole; 213, hole column; 214, limiting step; 215, abutting step; 220, bearing portion; 221, buckle; 222, slot;

[0035] 230, fixing seat; 231, positioning member; 232, limiting member;

[0036] 240, rotating seat; 241, latching teeth; 242, gear slot; 245, connecting column;

[0037] 250, elastic member; 251, first end; 252, second end; 260, anti-dropping member; 261, enlarged diameter end; 262, connecting end;

[0038] 300, driving power source; 310, circuit board; 311, button hole; 312, second connector; 313, edge; 320, electronic components; 325, driving unit;

[0039] 400, light-emitting component; 410, substrate; 411, first connector; 420, LED lamp bead; 430, reflector. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] It should be noted that when a component is referred to as being "connected" to another component, it may be directly connected to the other component or there may be a central component. When a component is referred to as being "disposed on" another component, it may be directly disposed on the other component or there may be a central component at the same time.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0043] In this application, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number or order of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] In this application, the terms "comprises" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a system, product or device comprising a series of units is not necessarily limited to those units explicitly listed, but may include other units not explicitly listed or inherent to these products or devices.

[0045] In the present application, the terms "corresponding", "corresponding", "matching", "adaptable", such as "B corresponding to A", "B corresponding to A", "A corresponds to B", or "B corresponds to A", indicate that B has a corresponding relationship with A in shape, position or function, and B can be determined according to A. Determining B according to A does not mean determining B only according to A, but B can also be determined according to A and / or other information.

[0046] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, so that the internal connection of two elements or the interaction relationship between two elements can be achieved. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] See also Figure 1 to Figure 6 An embodiment of the present application provides an LED tube lamp, which includes a lamp housing, the lamp housing includes a lamp tube 100 and a lamp holder 200 arranged at both ends of the lamp tube 100, and the LED tube lamp also includes a driving power supply 300 and a light-emitting component 400 arranged inside the lamp housing. The lamp holder 200 includes an end wall 201 and a cylindrical wall 202 sleeved on the end of the lamp tube 100. A conductive member 203 for connecting to an external power supply and electrically connecting to the driving power supply 300 is provided on the end wall 201 of the lamp holder 200. The external power supply may be, for example, a mains power supply, and the conductive member 203 may be, for example, a double pin for power input. The light-emitting component 400 includes a substrate 410 and an LED lamp bead 420 arranged on the substrate 410. The driving power supply 300 includes a circuit board 310 and electronic components 320 arranged on the circuit board 310, and the circuit board 310 is substantially parallel to the substrate 410.

[0048] See also Figure 4 ,as well as Figure 7-Figure 8 The interior of the lamp holder 200 is provided with a blocking portion 211 that abuts against the circuit board 310 to limit its movement away from the lamp tube 100, and a bearing portion 220 that extends inward from the blocking portion 211 and abuts against the circuit board 310. The bearing portion 220 is provided with a buckle 221, and the circuit board 310 is provided with a buckle hole 311 that cooperates with the buckle 221.

[0049] The bearing part 220 and the circuit board 310 of this embodiment are close to each other to limit the circumferential shaking of the circuit board 310. The buckle 221 of the bearing part 220 and the circuit board 310 fix the circuit board 310 to the lamp holder 200 through snap-fit. When assembling the LED tube light, the driving power supply 300 is fixed to the lamp holder 200 to complete the circuit connection between the driving power supply 300 and the conductive member 203. At this time, the driving power supply 300 has a unique position relative to the lamp holder 200. Then the lamp holder 200 is connected and fixed to the lamp tube 100. At this time, the driving power supply 300 has a unique position relative to the lamp tube 100. The LED tube light provided in this embodiment improves the convenience of assembly. The lamp holder 200 and the lamp tube 100 can be provided with a mutually cooperating snap-fit ​​structure 110. The snap-fit ​​structure 110, for example, includes a snap protrusion provided on the lamp holder 200 and a snap hole provided on the lamp tube 100 and cooperating with the snap protrusion. The lamp holder 200 is connected to the lamp tube 100 by a snap-fit ​​structure 110, which replaces the conventional gluing fixation, simplifies the assembly method, saves assembly time, and eliminates the curing time of gluing fixation.

[0050] See also Figure 5-6 , the electronic component 320 includes a switch element with a driving part 325, the circuit board 310 has a back side facing the substrate 410 and a front side with a switch element, and the lamp tube 100 is provided with an avoidance hole 120 corresponding to the exposure of the driving part 325. The switch element may include, for example, a three-speed switch element and a five-speed switch element for adjusting power and color temperature respectively, and each of the three-speed switch element and the five-speed switch element has a driving part 325, for example, the former can adjust three power levels of 11w, 13w, and 16w, and the latter can adjust five color temperatures (3000K / 3500K / 4000K / 5000K / 5700K). The avoidance hole 120 is used to penetrate and install a dial switch 130 adapted to the driving part 325. The light-emitting assembly 400 also includes a reflector 430 arranged on the light-emitting side of the substrate 410, and the reflector 430 is, for example, a PET reflector sheet, which is used to increase the light efficiency and improve the luminous flux under the same light-emitting power.

[0051] See also Figure 7 to Figure 9Further, a partition 210 extending radially inside the barrel wall 202 of the lamp holder 200 forms a blocking portion 211, and a wire hole 212 is provided in the partition 210 for the power supply line to pass through, and the wire is used to electrically connect the conductive member 203 and the driving power source 300. The bearing portion 220 is provided with two oppositely arranged card slots 222, and the card slots 222 are, for example, U-shaped slots. The circuit board 310 partially extends into the space defined by the two card slots 222, and the two side edges 313 of the local circuit board 310 match the card slots 222, and the edges 313 are formed by opening holes along the axial direction.

[0052] See also Fig.10 Furthermore, the substrate 410 is overlapped with the circuit board 310, and the circuit board 310 is on the backlight side of the substrate 410. The backlight surface of the substrate 410 is provided with a first connector 411 electrically connected to the LED lamp bead 420, and the end of the circuit board 310 away from the lamp holder 200 is provided with a second connector 312 plugged and matched with the first connector 411. When the driving power supply 300 is inserted into the lamp tube 100 along with the lamp holder 200, the first connector 411 correspondingly enters the second connector 312, thereby realizing the circuit connection between the light-emitting component 400 and the driving power supply 300.

[0053] See also Fig. 9 , Figure 11-12 In some embodiments, the lamp holder 200 includes a fixed seat 230 and a rotating seat 240 which can rotate relative to each other around an axis and can move relative to each other in the axial direction, and an elastic member 250 which acts on the fixed seat 230 and the rotating seat 240 so that the two have a tendency to approach each other in the axial direction, the fixed seat 230 is used to connect the lamp tube 100, the rotating seat 240 has an end wall 201 on which a conductive member 203 is arranged, and the fixed seat 230 has a cylindrical wall 202 which is sleeved on the end of the lamp tube 100;

[0054] An angle adjustment mechanism is provided between the fixed seat 230 and the rotating seat 240. The angle adjustment mechanism includes a plurality of circumferentially arranged latch teeth 241 provided on one of the fixed seat 230 and the rotating seat 240 and a positioning member 231 provided on the other. A gear slot 242 cooperating with the positioning member 231 is formed between adjacent latch teeth 241. The other is also provided with a limiting member 232 cooperating with the edgemost latch teeth 241 to limit the rotation range of the fixed seat 230 and the rotating seat 240. When adjusting the relative angle between the fixed seat 230 and the rotating seat 240, the two are first separated axially so that the positioning member 231 is separated from the gear slot 242. After the two are rotated to a certain angle, the positioning member 231 is inserted into the other gear slot 242 under the action of the elastic member 250. The limiting member 232 limits the rotation range of the fixed seat 230 and the rotating seat 240 by cooperating with the edgemost latch teeth 241 to prevent the wires from being twisted.

[0055] Furthermore, the extension length of the limiting member 232 is greater than the extension length of the positioning member 231, so that when the positioning member 231 is disengaged from the gear slot 242, the latch 241 keeps restricting the limiting member 232. An anti-slip structure is provided between the fixed seat 230 and the rotating seat 240 to limit the axial separation of the two. The maximum stroke allowed by the anti-slip structure is less than the stroke of the limiting member 232 disengaging from the latch 241.

[0056] When it is necessary to adjust the rotation angle of the rotating seat 240 relative to the fixed seat 230, the rotating seat 240 is first moved outward to separate the fixed seat 230 and the rotating seat 240 axially, and the positioning member 231 is disengaged from the gear slot 242. Since the maximum stroke of the anti-slip structure is smaller than the stroke of the limiting member 232 disengaging the latching teeth 241, the positioning member 231 does not affect the cooperation between the limiting member 232 and the uppermost latching teeth 241 when it is disengaged from the gear slot 242. In the process of adjusting the angle, the rotation range of the rotating seat 240 is limited to avoid tangling of the wires, that is, to avoid the excessive rotation of the rotating seat 240 relative to the fixed seat 230, which causes the wires to be tangled and affects the stability of the circuit.

[0057] The end wall 201 has a connecting column 245 extending inwardly along the axial direction, and the blocking portion 211 is provided with a hole column 213 extending axially toward the end wall 201. The connecting column 245 and the hole column 213 are sleeved with each other, and an elastic member 250 is provided therebetween. The anti-slip structure includes a limiting step 214 provided on the inner surface of the hole column 213 and an anti-slip member 260 for connecting with the connecting column 245, and the anti-slip member 260 abuts against the elastic member 250.

[0058] The anti-slip member 260 has an enlarged diameter end 261 and a connecting end 262. The diameter of the enlarged diameter end 261 is larger than the through hole of the hole column 213. The connecting end 262 is used to connect with the connecting column 245. When the fixed seat 230 and the rotating seat 240 are axially separated, the enlarged diameter end 261 moves toward the limiting step 214 and is limited by the limiting step 214 to limit the maximum stroke allowed by the anti-slip structure. The anti-slip member 260 can be, for example, a screw, and the elastic member 250 can be, for example, a coil spring sleeved on the anti-slip member 260, having a first end 251 abutting against the enlarged diameter end 261, and a second end 252 abutting against the inner side of the hole column 213. Specifically, the inner surface of the hole column 213 is provided with abutting step 215 matched with the second end 252, and the abutting step 215 is close to the rotating seat 240 relative to the limiting step 214.

[0059] See also Figure 5-6 ,as well as Fig.13When assembling the LED lamp tube 100 of each embodiment of the present application, the following steps are included: (1) assembling the lamp tube 100 and placing the light-emitting component 400 in the tube body; (2) assembling the fixed seat 230 and the rotating seat 240 of the lamp head 200; (3) clamping and fixing the circuit board 310 of the driving power supply 300 to the lamp head 200 to complete the circuit connection between the driving power supply 300 and the conductive member 203; (4) fixing the lamp head 200 to the lamp tube 100 to complete the circuit connection between the driving power supply 300 and the substrate 410; (5) installing the dial switch 130 of the matching driving part 325 through the avoidance hole 120 of the lamp tube 100; (6) if the angle needs to be adjusted, axially separate the rotating seat 240 from the fixed seat 230, and after rotating and adjusting to the corresponding gear position, the positioning member 231 is restricted by the corresponding locking tooth 241 under the action of the elastic member 250 to complete the angle adjustment.

[0060] The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. When the technical features in different embodiments are embodied in the same figure, it can be regarded that the figure also discloses the combination examples of the various embodiments involved.

[0061] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. LED tube light, characterized in that, The invention comprises a lamp housing, and a light-emitting component and a driving power supply arranged inside the lamp housing, wherein the light-emitting component comprises a substrate and LED lamp beads arranged on the substrate, the driving power supply comprises a circuit board and electronic components arranged on the circuit board, the circuit board is basically parallel to the substrate, the lamp housing comprises a lamp tube and lamp holders arranged at both ends of the lamp tube, the lamp holders comprise end walls and a barrel wall sleeved on the ends of the lamp tube, the end walls are provided with a conductive member for connecting to an external power supply and electrically connecting to the driving power supply, the interior of the lamp holder is provided with a blocking portion which abuts against the circuit board to limit its movement away from the lamp tube, and a bearing portion which extends inward from the blocking portion and abuts against the circuit board, the bearing portion is provided with a buckle, and the circuit board is provided with a buckle hole which cooperates with the buckle.

2. The LED tube lamp according to claim 1, characterized in that: The bearing portion is provided with two oppositely arranged slots, the circuit board partially extends into the space defined by the two slots, and the two side edges of the local circuit board match with the slots.

3. The LED tube lamp according to claim 1, characterized in that: The blocking portion is formed by a partition extending radially on the inner side of the cylinder wall, and a wire hole for the power supply wire to pass through is formed in the partition.

4. The LED tube lamp according to claim 1, characterized in that: The electronic component comprises a switch element having a driving part, the circuit board has a back side facing the substrate and a front side provided with the switch element, and the lamp tube is provided with a corresponding avoidance hole exposing the driving part.

5. The LED tube lamp according to claim 1, characterized in that: The substrate is overlapped and matched with the circuit board, and the backlight surface of the substrate is provided with a first connector electrically connected to the LED lamp bead, and the end of the circuit board away from the lamp holder is provided with a second connector plugged and matched with the first connector.

6. The LED tube lamp according to claim 1, characterized in that: The lamp holder comprises a fixed seat and a rotating seat which can rotate relative to each other around an axis and can move relative to each other in the axial direction, the fixed seat is used to connect the lamp tube, the rotating seat has the end wall on which the conductive member is arranged, and the fixed seat has the barrel wall which is sleeved on the end of the lamp tube; An angle adjustment mechanism is arranged between the fixed seat and the rotating seat, and the angle adjustment mechanism includes a plurality of circumferentially arranged latching teeth provided on one of the fixed seat and the rotating seat and a positioning piece provided on the other, and a gear groove cooperating with the positioning piece is formed between adjacent latching teeth, and the other is also provided with a limiting piece cooperating with the outermost latching teeth to limit the rotation range of the fixed seat and the rotating seat.

7. The LED tube lamp according to claim 6, characterized in that: The extension length of the limiting member is greater than the extension length of the positioning member, so that when the positioning member is separated from the gear slot, the latch tooth keeps restricting the limiting member.

8. The LED tube lamp according to claim 7, characterized in that: An anti-slip structure for limiting axial separation of the fixed seat and the rotating seat is provided between the fixed seat and the rotating seat, and the maximum stroke of relative movement allowed by the anti-slip structure is smaller than the stroke of the limiting member disengaging from the latching tooth.

9. The LED tube lamp according to claim 8, characterized in that: The end wall has a connecting column extending axially inward, and the blocking portion is provided with a hole column extending axially toward the end wall. The connecting column and the hole column are sleeved with each other, and an elastic member is provided therebetween to act on the fixed seat and the rotating seat so that the two have a tendency to approach each other axially.

10. The LED tube lamp according to claim 9, characterized in that: The anti-slip structure includes a limiting step arranged on the inner surface of the hole column and an anti-slip component connected to the connecting column. The anti-slip component has an expanded end with a diameter larger than the hole of the hole column, and the elastic component abuts between the expanded end and the limiting step.

Images