KR102337511B1 - Plane Lighting Device having Elastically Assembling Structure for Preventing Movement of Diffuser - Google Patents

Abstract

The present invention is composed of a body frame 110 having an LED PCB substrate 111 formed therein, a diffusion plate 120 that is seated on the seating part 112 at the lower end of the body frame 110, and an aluminum material. A bead-type reinforcing plate 130 formed in a grid structure by molding and fixed with an LED PCB substrate 111, a ceiling fixing bracket 140 that is integrally press-formed and fixed to the body frame 110, and the ceiling is fixed It is interposed between the detachable clips 141 at both ends of the bracket 140 and the body frame 110 and includes a clip fastener 150 that is coupled by pressing the upper end with the ceiling fixing bracket 140 in a one-touch detachable manner. The rim 134 of the reinforcing plate 130 is composed of a U-shaped pressure bonding plate 134a and a horizontal bonding plate 134b extending in the horizontal direction from the pressure bonding plate 134a, and the pressure bonding plate 134a. ) discloses a surface lighting having an elastic assembly structure for preventing separation of the diffusion plate, which can prevent the diffusion plate 120 from being separated from the body frame 110 by pressing the diffusion plate 120 with an elastic force.

Description

Plane Lighting Device having Elastically Assembling Structure for Preventing Movement of Diffuser

The present invention relates to a surface lighting having an elastic assembly structure for preventing separation of a diffusion plate, and more particularly, to a diffusion plate by pressing the diffusion plate with an elastic force while stably fixing the edge of the bead-type reinforcing plate to a body frame by bolting it. It relates to a surface lighting having an elastic assembly structure for preventing separation of a diffusion plate, which can prevent separation of a diffusion plate by restricting the lateral movement of the light.

As is well known, LEDs (Light Emitting Diodes) are eco-friendly, low-power, high-brightness, and have good lifespan and durability, and are widely used as landscape lighting, advertisement lighting, or general ceiling lighting devices.

On the other hand, the indoor LED surface lighting device is mainly installed on the ceiling to irradiate the indoor space. During installation or long-term use, the diffuser plate that diffuses the light irradiated from the LED shakes in the lateral direction, so that the illuminance is not uniform, or the illuminance is not uniform from the body frame. In some cases, a safety accident may occur in which a person falls apart and falls apart.

Accordingly, there is a need for a technology capable of reducing the thickness while stably fixing the diffusion plate to the body frame.

Korean Patent Publication No. 1448587 (Diffuser plate fastening structure for LED lighting, 2014. 10. 01.) Korean Utility Model Publication No. 0486814 (LED lighting fixture with diffusion plate tension adjustment panel, 2018. 06. 27.) Korean Utility Model Publication No. 20-0469652 (Structure of corner reinforcement for flat panel lighting, October 29, 2013)

The technical problem to be achieved by the spirit of the present invention is to provide a surface lighting having an elastic assembly structure for preventing separation of the diffusion plate, which can be configured to be slim while stably fixed to the body frame.

In order to achieve the above object, the present invention, a rectangular body frame in which a plurality of LED PCB substrates are arranged on the inside; a diffusion plate mounted in a flat plate shape on a seating portion extending inwardly from a lower end of the body frame; It is seated on the seating portion and stacked on the upper side of the diffusion plate, is made of aluminum and has a embossed or engraved lattice structure by press molding, and an LED PCB substrate with a plurality of LEDs arranged on the bottom surface is fixed in the inner space. formed bead-type reinforcing plate; a ceiling fixing bracket that is integrally press-formed in a bar shape across the top of the bead-type reinforcing plate and fixed to the body frame; and a clip fastener interposed between the detachable clips at both ends of the ceiling fixing bracket and the body frame and coupled to the ceiling fixing bracket by pressing the upper end in a one-touch and detachable manner. Consists of a pressure-adhesive plate bent in a shape to closely fix the diffusion plate to the seating portion, and a horizontal coupling plate extending in a horizontal direction from the pressure-adhesive plate and compressed to the body frame by the clip fastener, Provided is a surface lighting having an elastic assembly structure for preventing separation of a diffusion plate, wherein the pressure-adhesive plate presses the diffusion plate with an elastic force to prevent separation of the diffusion plate from the body frame.

Here, one side of the clip fastener is inserted into a hook formed on the inner wall of the body frame to be fastened and the other side of the clip fastener is horizontally coupled to the bolt fastener formed at the lower end of the body frame. By fixing the bolts through the bolt fastening holes of the plate, the bead-type reinforcing plate may press the diffusion plate by an elastic force.

In addition, the anti-slip pad layer may be laminated on the pressure-adhesive plate facing the diffusion plate.

Alternatively, a plurality of sawtooth or embossed stripes may be formed on the edge of the diffusion plate, and a plurality of sawtooth or embossed stripes may be formed to correspond to the pressure-adhesive plate opposite to the stripe.

In addition, one side of the clip fastener is formed in the shape of a hook fastening pin formed by bending a U-shape, and the hook may be elongated so that the hook fastening pin is guided in the lateral direction to be inserted and fastened.

In addition, the LED PCB substrate in the bar form is fixedly formed in a mounting groove indented in a bar shape by the grid structure of the bead type reinforcing plate, or the LED in the form of a flat plate is formed on the bottom plane of the lattice structure of the bead type reinforcing plate. A PCB substrate is fixedly formed, and the LED PCB substrate may be attached to and fixed to the grid structure of the bead-type reinforcing plate through double-sided tape, adhesive, or heat dissipation silicone.

In addition, the detachable clip includes a first guide piece extending vertically downward from both ends of the ceiling fixing bracket, a second guide piece extending in an inward diagonal direction from the first guide piece, and from the second guide piece. A first connecting piece extending in the horizontal direction, a third guide piece formed symmetrically to face the second guide piece, a fourth guide piece formed symmetrically to face the first guide piece, and the fourth guide A pressing piece formed extending in the horizontal direction from the piece, a pair of fastening pieces that are symmetrically extended in an outer oblique direction from the first connecting piece and bent, and a pair of second pieces that are symmetrically extended in an inner oblique direction from the fastening piece It is configured symmetrically in the form of a pair of clips composed of a connecting piece, wherein a pair of opposing fastening pieces are connected to the second connecting piece, and an insertion groove is opened at the upper end of the clip fastening member, and the pressing piece or the above By the pressurization of both ends of the ceiling fixing bracket, the first and fourth guide pieces advance from the first connecting piece to the upper end direction and are inserted into the insertion groove, and after insertion, the fastening piece is expanded outward by an elastic force. , the detachable clip may be fixed to the insertion groove of the clip fastener.

According to the present invention, a bead-type reinforcing plate is used to slim the surface lighting, and the rim of the bead-type reinforcing plate is bolted to secure it to the body frame while pressing the diffusion plate by elastic force to prevent the diffusion plate from moving in the lateral direction. It has the effect of limiting and preventing escape.

In addition, the bead-type reinforcing plate made of aluminum material and formed into an embossed or engraved lattice structure by press molding prevents bending, deflection or distortion of the LED PCB substrate and the body frame to increase durability, This effectively dissipates heat generated from the LED PCB substrate and further increases the heat dissipation efficiency by additionally configuring a heat dissipation groove or a heat dissipation fin.

Furthermore, the body frame can be easily attached to and detached from the ceiling fixing bracket by the one-touch fastening structure of the detachable clip and the clip fastener, thereby simplifying the ceiling installation work of the LED surface light and making it easy to assemble and disassemble. It is integrally formed in the press step, thereby increasing durability by minimizing the number of related parts, and simplifying the manufacturing process, thereby improving product yield.

1 is a perspective view of a surface lighting having an elastic assembly structure for preventing separation of a diffusion plate according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view of the surface lighting having an elastic assembly structure for preventing separation of the diffusion plate of FIG. 1 .
3 and 4 show the elastic assembly structure of the clip fastener of the surface lighting having the diffusion plate separation prevention elastic assembly structure of FIG.
5 to 7 show the clip fastening structure of the surface light having the diffusion plate separation prevention elastic assembly structure of FIG. 1 of FIG. 1 .
FIG. 8 is an example of an adhesion structure between the bead-type reinforcing plate and the diffuser plate of the surface illumination having an elastic assembly structure for preventing separation of the diffuser plate of FIG. 1 .
9 to 11 are views illustrating a cross-sectional structure of a bead-type reinforcing plate of a surface illumination having an elastic assembly structure for preventing separation of the diffusion plate of FIG. 1 .
FIG. 12 is a separate view illustrating the coupling structure of the ceiling fixing bracket of the surface lighting having the elastic assembly structure for preventing separation of the diffusion plate of FIG. 1 .
13 illustrates various side structures of the main body frame of the surface light having an elastic assembly structure for preventing separation of the diffusion plate of FIG. 1, respectively.

Hereinafter, embodiments of the present invention having the above-described characteristics with reference to the accompanying drawings will be described in more detail.

1 to 13, the surface lighting having an elastic assembly structure for preventing separation of the diffusion plate according to an embodiment of the present invention, as a whole, a body frame 110 having an LED PCB substrate 111 formed therein, and a body A diffusion plate 120 seated on the seating part 112 at the lower end of the frame 110, and a bead-type reinforcement plate made of aluminum and formed into a grid structure by press molding and fixed with an LED PCB substrate 111 ( 130), and a ceiling fixing bracket 140 that is integrally press-processed and fixed to the body frame 110, and the detachable clips 141 of both ends of the ceiling fixing bracket 140 and the body frame 110 are interposed between A ceiling fixing bracket 140 and a clip fastener 150 coupled by pressing the upper end in a one-touch detachable manner, but the edge 134 of the bead-type reinforcing plate 130 is a U-shaped press-fitting plate 134a and , composed of a horizontal coupling plate 134b extending in the horizontal direction from the pressure bonding plate 134a. The point is to prevent the deviation of (120).

First, the body frame 110, as shown in FIGS. 1 and 2, is formed in a rectangular frame, and a plurality of LED PCB substrates 111 are arranged inside the body frame 110 to form a bead-type reinforcing plate ( 130) is formed at the bottom.

Next, the diffusion plate 120, as shown in FIGS. 2, 4, 6 and 7, is formed in a flat plate shape to diffuse the light irradiated from the LED, and from the lower end of the body frame 110 to the inside. It is seated and fixed on the upper end of the extended plate-shaped seating part 112 .

Next, the bead-type reinforcing plate 130, as shown in FIGS. 6 to 11, is made of an aluminum material with good thermal conductivity and is formed into a lattice structure of embossed or intaglio by press molding while realizing weight reduction, and the seating part It is seated on the 112, and is laminated on the upper side of the diffusion plate 120, and by the bead-type lattice structure, the LED PCB substrate 111 and the body frame 110 are bent, deflected or distorted while preventing deformation, the lower surface The LED PCB substrate 111 on which a plurality of LEDs are arranged is fixedly formed to radiate heat generated from the LED PCB substrate 111 to the outside.

Here, the edge 134 of the bead-type reinforcing plate 130 is bent in a U-shape to fix the diffusion plate 120 to the seating part 112 in close contact with the press-adhesive plate 134a, and the press-adhesive plate 134a. Consists of a horizontal coupling plate 134b extending from the horizontal direction and compressed to the body frame 110 by means of a clip fastener 150, and the pressure-adhesive plate 134a presses the diffusion plate 120 by an elastic force. By restricting the movement of the diffusion plate 120 from the body frame 120 , it is possible to prevent the diffusion plate 120 from being separated in the lateral direction.

In addition, as shown in FIGS. 4 to 7 , one side of the clip fastener 150 is inserted into the hook 113 formed on the inner wall of the body frame 120 to be fastened and fastened, and The other side is bolted through the bolt fastening hole 134b-1 (refer to FIG. 4) of the horizontal coupling plate 134b of the bead-type reinforcing plate 130 to the bolt fastening hole 114 formed on the outer edge of the lower end of the body frame 110. By fastening and fixing, the bead-type reinforcing plate 130 can press the diffusion plate 120 by the elastic force of the pressure-adhesive plate 134a.

For example, as shown in enlarged view in FIGS. 4 and 5 , one side of the clip fastener 150 is formed in the shape of a hook fastening pin 152 formed by bending a U-shape, and the hook 113 is a hook fastening pin 152 . ) is guided in the lateral direction and formed to be long to be inserted and fastened, and passes through the through hole 153 of the clip fastener 150 formed corresponding to the bolt fastener 114 from the top of the insertion groove 151 through the bolt fastener ( The bolt 154 is bolted to the 114 , so that the clip fastener 150 and the bead-type reinforcing plate 130 can be fixed to the body frame 110 .

In addition, as shown separately in FIG. 8(a), the anti-slip pad layer 134a-1 is laminated on the pressure-adhesive plate 134a facing the diffusion plate 120, so that the anti-slip pad layer 134a is formed. -1) limits the lateral sliding of the diffuser plate 120 , thereby preventing the diffuser plate 120 from detaching and stably fixing the diffuser plate 120 . Here, an additional anti-slip pad layer may be laminated on the diffusion plate 120 to face the anti-slip pad layer 134a-1.

Alternatively, as shown in (b) of FIG. 8 , a plurality of sawtooth or embossed stripes 121 are formed on the edge of the diffusion plate 120 , and the pressure-adhesive plate 134a opposing the stripes 121 is formed. ), a number of sawtooth-shaped or embossed stripes 134a-2 are formed correspondingly, so that the lateral sliding of the diffusion plate 120 is limited by the staggered coupling of the stripes 121 and the stripes 134a-2. , the diffusion plate 120 can be stably fixed by preventing the separation.

On the other hand, the bar-shaped LED PCB substrate 111 may be fixedly formed in the mounting groove 131 indented in the bar shape by the grid structure of the bead-type reinforcing plate 130 .

Alternatively, although not shown, a flat LED PCB substrate is fixedly formed on the bottom plane of the grid structure of the bead-type reinforcement plate 130, so that the heat dissipation structure by the space between the LED PCB substrate and the contact surface of the embossed or engraved grid structure can also be implemented.

In addition, the LED PCB substrate 111 may be attached to and fixed to the grid structure of the bead-type reinforcing plate 130 via double-sided tape, adhesive, or heat dissipation silicone.

On the other hand, although not shown, in the grid structure of the bead-type reinforcing plate 130, a plurality of heat dissipation holes (not shown) are penetrating at regular intervals, and communicate with the LED PCB substrate 111 below the LED PCB substrate ( 111) directly to the outside, a plurality of heat dissipation fins (not shown) are formed at regular intervals on the upper plane of the bead-type reinforcing plate 130 to expand the heat dissipation area to the LED PCB substrate 111 It can also effectively dissipate heat generated from the outside.

In addition, the bead-type reinforcing plate 130 may have a lattice structure of various shapes in a circular, square or rectangular shape, and the LED PCB substrate may be formed in a circular, square or rectangular shape corresponding to the lattice structure.

Next, the ceiling fixing bracket 140 is integrally press-processed in a bar shape across the top of the bead-type reinforcing plate 130 and fixed to the body frame 110 .

In addition, detachable clips 141 are integrally formed at both ends of the ceiling fixing bracket 140 , and can be coupled and separated from the insertion groove 151 of the clip fastener 150 in a one-touch detachable structure.

Specifically, as shown in FIGS. 5 to 7 , the detachable clip 141 includes a first guide piece 141a extending downward from both ends of the ceiling fixing bracket 140 in a vertical direction, and a first guide piece ( A second guide piece 141b extending in an inward oblique direction from 141a), a first connecting piece 141c extending in a horizontal direction from the second guide piece 141b, and a second reference to the first connecting piece 141c A third guide piece 141d symmetrically formed to face the guide piece 141b, and a fourth guide piece 141e formed symmetrically to face the first guide piece 141a with respect to the first connection piece 141c ), a pressing piece 141f formed to extend in the horizontal direction from the fourth guide piece 141e, and a second guide piece 141b and spaced apart from the first connecting piece 141c symmetrically extending in the outer oblique direction and bent A pair of fastening pieces 141g and a pair of second connecting pieces 141h symmetrically extending in an inner diagonal direction from the fastening piece 141g are symmetrically configured in the form of a pair of clips.

Here, the opposing pair of fastening pieces 141g are connected by a second connecting piece 141h, and referring to FIG. 7 , by pressing both ends of the pressing piece 141f or the ceiling fixing bracket 140, the first connecting piece From (141c), the first guide piece (141a) and the fourth guide piece (141e) advance in the upper direction and are inserted into the insertion groove (151), and after insertion, the fastening piece (141g) is expanded outward by an elastic force, , the detachable clip 141 may be fixed to the insertion groove 151 of the clip fastener 150 .

In addition, by the spacing of the second connecting piece (141h) according to the expansion of the fastening piece (141g), the clip fastener 150 is in close contact with the lower end of the pressing piece (141f), to minimize the gap between the body frame ( While fixing 110 to the ceiling without lifting, it is possible to block the penetration of foreign substances into the body frame 110 .

In addition, the fastening piece 141g is formed more inclined outwardly than the second guide piece 141b and the third guide piece 141d, and the outer guide piece serves as a guide to the insertion groove 151 and , the fastening piece 141g serves as a spring that compresses and expands in the lateral direction with respect to the first connecting piece 141c, so that the body frame 110 can be stably fixed in close contact with the ceiling fixing bracket 140 .

In addition, an opening 142 with a recessed opening is formed at the end of the ceiling fixing bracket 140 , and on one side of the pressing piece 141f opposite to the opening 142 , a stopper piece 141f- guided by the opening 142 . 1) is formed to extend in the horizontal direction, and a support piece 141f-2 bent to the lower end of the stopper piece 141f-1 is formed to support the protrusion piece 141f-3 in which the opening 142 is formed. have.

That is, when the pressing piece 141f is pressed, the stopper piece 141f-1 is guided by the opening 142 to prevent left and right twisting of the guide piece, and is guided by the support piece 141f-2 so that the guide piece is vertically twisted. can prevent

On the other hand, in the ceiling fixing bracket 140, a bolt fastener 143 through which a ceiling fixing bolt (not shown) for fixing to the ceiling is inserted may be formed at various intervals and in various shapes.

Next, the clip fastener 150 is interposed between the detachable clips 141 at both ends of the ceiling fixing bracket 140 and the body frame 110 and is coupled by pressing the upper end of the ceiling fixing bracket 140 in a one-touch detachable manner. .

On the other hand, as shown in FIG. 5, the length of the insertion groove 151 of the clip fastener 150 is formed to be longer than the width of the detachable clip 141, and the detachable clip 141 along the insertion groove 151. It is configured to slide back and forth so that the ceiling fixing position of the body frame 110 may be changed according to the situation.

In addition, as shown in FIG. 12 , the ceiling fixing bracket 140 is formed in a pair to face the top of the bead-type reinforcing plate 130 , and the pair of ceiling fixing brackets 140 is a connecting bracket 144 interposed therebetween. ), the insertion fastening grooves 144a are formed at the lower ends of both ends of the connection bracket 144, and the insertion pieces 145 inserted into the insertion fastening grooves 144a at the middle of the ceiling fixing bracket 140 are Since the extension is formed, the ceiling fixing bracket 140 can be easily assembled by the insertion and fastening of the insertion fastening groove 144a and the insertion piece 145 .

On the other hand, FIG. 13 exemplifies various side structures of the main frame of the surface lighting having an elastic assembly structure for preventing separation of the diffusion plate of FIG. 1 , and shows various compression molding cross-sectional structures of the main frame 110 .

For example, the corner of the body frame 110 is formed by bending at a right angle (a), the corner is chamfered to form a chamfer (b), the corner is smoothly rounded (c, d), or the corner is smoothly rounded Formed and aesthetically concave-convex portions (A) are formed on the side and bottom surfaces of the body frame 110 (e), or the lower surface of the body frame 110 may be aesthetically multi-staged (B) and stepped (f).

That is, the body frame 110 may be formed by extrusion molding into various shapes according to the installation environment or the preference of consumers.

Therefore, by using the bead-type reinforcing plate to slim the surface lighting by the configuration of the surface lighting having the diffusion plate separation prevention elastic assembly structure as described above, the edge of the bead-type reinforcement plate is bolted to secure the body frame. By pressing the diffuser plate with elastic force while fixing it with an elastic force, it restricts the lateral movement of the diffuser plate to prevent separation, and the bead-type reinforcement plate made of aluminum material and formed into an embossed or engraved lattice structure by press molding, LED It improves durability by preventing bending, sagging or warping of the PCB substrate and body frame, effectively dissipating heat generated from the LED PCB substrate by lattice grooves, and additionally configuring heat dissipation grooves or heat dissipation fins to further increase the heat dissipation efficiency. have.

Configurations shown in the embodiments and drawings described in this specification are only the most preferred embodiment of the present invention, and do not represent all of the technical spirit of the present invention, so various equivalents that can be substituted for them at the time of the present application It should be understood that there may be water and variations.

110: body frame 111: LED PCB board
112: seating part 113: hook
114: bolt fastener 120: diffuser plate
130: bead-type reinforcement plate 131: mounting groove
134: border 134a: pressure-adhesive plate
134b: horizontal coupling plate 140: ceiling fixing bracket
141: removable clip 142: opening
143: bolt fastener 144: connection bracket
145: insertion piece 150: clip fastener
151: insertion groove 152: hook fastening pin
153: through hole 154: bolt

Claims (7)

A rectangular body frame in which a plurality of LED PCB boards are arranged inside;
a diffusion plate mounted in a flat plate shape on a seating portion extending inwardly from a lower end of the body frame;
It is seated on the seating portion and stacked on the upper side of the diffusion plate, is made of aluminum and has a embossed or engraved lattice structure by press molding, and an LED PCB substrate with a plurality of LEDs arranged on the bottom surface is fixed in the inner space. formed bead-type reinforcing plate;
a ceiling fixing bracket that is integrally press-formed in a bar shape across the top of the bead-type reinforcing plate and fixed to the body frame; and
A clip fastener interposed between the detachable clips at both ends of the ceiling fixing bracket and the body frame and coupled to the ceiling fixing bracket in a one-touch and detachable manner; including,
The edge of the bead-type reinforcing plate is bent in a U-shape to fix the diffusion plate in close contact with the seating portion, and the pressure-adhesive plate extends in the horizontal direction from the pressure-adhesive plate to the body frame by the clip fastener. It is composed of a horizontal coupling plate that is compressed, and the pressure-adhesive plate presses the diffusion plate by an elastic force to prevent separation of the diffusion plate from the body frame,
One side of the clip fastener is inserted into a hook formed on the inner wall of the body frame to be fastened, and the other side of the clip fastener is a bolt fastener formed on the lower periphery of the main frame to the horizontal coupling plate of the bead-type reinforcing plate. Surface lighting with an elastic assembly structure for preventing separation of a diffusion plate, characterized in that the bead-type reinforcing plate presses the diffusion plate by an elastic force by fastening the bolt through the bolt fastening hole.
delete According to claim 1,
A surface light having an elastic assembly structure for preventing separation of a diffusion plate, characterized in that a slip prevention pad layer is laminated on the pressure-adhesive plate facing the diffusion plate.
According to claim 1,
A diffusion plate, characterized in that a plurality of sawtooth or embossed stripes are formed on the edge of the diffusion plate, and a plurality of sawtooth or embossed stripes are formed correspondingly to the pressure-adhesive plate opposite the stripes. A surface light equipped with an elastic assembly structure to prevent separation.
According to claim 1,
One side of the clip fastener is formed in the shape of a hook fastening pin formed by bending a U-shape, and the hook is elongated so that the hook fastening pin is guided in the lateral direction to be inserted and fastened. A surface light with a structure.
According to claim 1,
The LED PCB substrate in the bar form is fixedly formed in a mounting groove indented in a bar shape by the grid structure of the bead type reinforcement plate, or the LED PCB substrate in the flat shape on the bottom plane of the lattice structure of the bead type reinforcement plate. This is fixed,
The LED PCB substrate is attached to the grid structure of the bead-type reinforcing plate via double-sided tape, adhesive or heat dissipation silicone, and is fixed to the surface light with an elastic assembly structure for preventing separation of the diffusion plate.
According to claim 1,
The detachable clip includes a first guide piece extending vertically downward from both ends of the ceiling fixing bracket, a second guide piece extending in an inward diagonal direction from the first guide piece, and a horizontal direction from the second guide piece. a first connecting piece extending from A pressing piece extending in the horizontal direction, a pair of fastening pieces bent by extending symmetrically from the first connecting piece in an outer oblique direction, and a pair of second connecting pieces extending symmetrically in an inner oblique direction from the fastening piece It is configured symmetrically in the form of a pair of clips, wherein a pair of opposing fastening pieces are connected by the second connecting piece,
An insertion groove is formed in the upper end of the clip fastener,
By the pressing of both ends of the pressing piece or the ceiling fixing bracket, the first and fourth guide pieces from the first connection piece are advanced toward the upper end and are inserted into the insertion groove, and after insertion, the fastening piece is moved outward. It is expanded by an elastic force, and the detachable clip is fixed to the insertion groove of the clip fastener.

Images