TWM512660U - LED lamp - Google Patents

Description

LED light fixture

This creation is about LED luminaires, especially LED luminaires that have high space efficiency and prevent electronic components from short-circuiting or wire fire, and have excellent protection for lamps.

In the field of lamps and lanterns, LEDs have been widely used as light sources and various types of lamps that can be installed indoors and outdoors and in action type are derived from the application level. Generally, the types of lamps used for installing indoor ceilings can be divided into lamp type, embedded and laminate lights, etc., for use as illumination.

For example, a lamp type LED lamp is conventionally installed with a fixing bracket before the ceiling, and a plurality of electrical connecting holes are arranged on the fixing bracket, and two end sides of the LED lamp tube are respectively provided with one end cover at each end. The cover has a plurality of pins corresponding to the electrical connection holes. During installation, the LED tube is screwed to the fixing bracket, and the pins are electrically connected to the electrical connection holes to drive the LED tube. However, such an installation procedure is complicated and time consuming, and is limited by the specifications of the LED tube. The fixing bracket and the LED tube must be matched to each other in order to be used in combination, so that the purchase is subject to specifications and cannot be used. In the case of the consumer, there are many inconveniences in the use.

Then, in order to solve the inconvenience of the above-mentioned separate installation of the luminaire, an electronic component that is electrically connected to the LED lamp tube is disposed in the end cover, and the external luminaire can be directly supplied to the LED lamp through the external power supply. The fixing bracket can be omitted to improve the installation efficiency and ease of use, and the LED lamp can be further suspended or clamped according to the demand. Set on the ceiling, no need to be limited by the fixed bracket and matching models. However, in this way, various electronic components required for driving the luminaire need to be disposed in the end caps. Moreover, the conventional LED lamp tube has an end cap that conforms to the cylindrical shape of the lamp tube, and is designed to be round. In order to facilitate the joint, therefore, the space available for the end cap to be used to set the components is greatly limited, resulting in a difficult component arrangement. In addition, since the lamp does not need to be installed on the ceiling first, the LED lamp must be hung or snapped to the ceiling through the connecting component for use. One end of the general connecting component can be assembled with the LED lamp through the through hole provided in the end cover, and the other end can be used to fix or suspend the LED lamp to the ceiling. However, as described above, electronic components such as power supply components are disposed in the end caps. Therefore, after the connection components are assembled with the end caps, the electronic components in the end caps are easily contacted with the connection components, thereby causing the wires to escape. Instability and danger of use. Alternatively, the connecting end portion may be formed to extend outwardly from the end cover to provide a closed portion, so that the end cover is in a closed state to prevent the connecting component from contacting the electronic component via the through hole, but in this manner, the connecting portion is additionally designed. In addition to increasing manufacturing costs, it also affects the overall vertical height of LED lamps and the aesthetics after suspension.

Therefore, the creator conceived an LED luminaire to effectively solve the above-mentioned deficiencies and provide a safer and more efficient luminaire.

One of the aims of the present invention is to provide an LED luminaire which is an integrated luminaire and has a better space utilization rate, and at the same time, can avoid the contact between the electronic components in the luminaire and the remaining components, thereby improving the safety of the luminaire, and The lamp has excellent protection.

In order to achieve the above objective, the LED lamp of the present invention has a lamp tube and a two-end cover, and the lamp tube is internally provided with an LED component, and the end caps are respectively connected to the two ends of the lamp tube and are provided for The power supply member and the power conversion member are respectively electrically connected to the LED assembly, and the end covers respectively have a first through hole for assembling a connecting member to Hanging or installing the LED lamp, the LED lamp is characterized in that: the LED lamp further has a back plate disposed on one side of the lamp tube and having a plurality of engaging holes to be combined with the end caps; Each of the end caps is a rectangular structure and has an accommodating space. A partition is disposed in the accommodating space for preventing the power supply member or the power conversion member from contacting the connecting member through the first through hole. Each of the end caps and the corresponding engaging holes are provided with a plurality of engaging members, each of the engaging members is disposed in the corresponding engaging holes and formed into a barbed state to assemble the end caps and the back board. The back plate is made of a metal material to improve the heat dissipation efficiency of the LED lamp.

One of the engaging members is formed with an abutting portion, and the engaging members are L-shaped or J-shaped, and each of the engaging members is inserted through the engaging hole and the top abutting portion is The back plate forms a snap-in state. By means of the abutting portions, the engaging members are fastened to the engaging holes and are in a barbed state, thereby improving the bonding strength between the backing plate and the pair of end caps, and facilitating assembly and replacement operations.

In order to fix each of the partitions in each of the end covers, each of the inner sides of the end caps has a plurality of first fixing portions, the partitions corresponding to the first fixing portions having a plurality of second fixing portions to be the first The fixing portions are fixed to each other.

Each of the end caps has a top case and a bottom case. The top case and the bottom case are oppositely disposed and combined to form the end cover to facilitate the provision of the power supply member and/or the power conversion member. And preferably, the first fixing portions are located in the top casings, and the first fixing portions are respectively a groove or a convex block, and the second fixing portions respectively correspond to the first fixing portions respectively. Is a bump or a groove such that the partition is located adjacent to the top case to lift the available space of the end cover.

Moreover, any of the end caps of the present invention is provided with a socket, and the socket is connected to the power source The conversion member is electrically connected, and any of the end covers is extended with a wire and a plug, and the plug is electrically connected to the power supply member through the wire. Thereby, the creation system can directly connect with an external power source through the plug to supply power to the LED lamp, and the socket can further power the LED lamp as a power source to supply power to other electronic devices or devices, or more The LED lamps are arranged in series through the plug and the socket.

The creation further includes a switch disposed at one of the end caps and electrically connected to the power supply member, and preferably the switch can be a sling chain switch. Thereby, the user can directly control the illumination state of the LED lamp through the switch to improve the convenience of use thereof.

In order to enable the pair of connecting members to be fastened to the pair of end caps, the first through holes are respectively located in the top case, and one of the first through holes is tapered toward one side. The other first through hole is tapered toward both sides to assemble the connector. By the first through holes having the tapered state, the pair of connecting members can be placed after the first through holes, and then can be moved to the tapered sides of the first through holes, so as to facilitate the The connecting members are respectively clamped into the corresponding first through holes to form a fixed connection, and the first through holes in such a manner can satisfy various installation requirements of the LED lamp.

In addition, in order to assemble the lamp tube and the pair of end caps, each of the end caps extends to form a connecting portion, and the engaging members are located at the connecting portion, and each of the connecting portions is annular and has a plurality of inner sides. The ribs are respectively provided with two second through holes corresponding to the ribs at opposite ends of the tube to be engaged with the ribs.

Therefore, the LED lamp of the present invention is a space usage rate of the pair of end caps lifting the component through the rectangular shape, and the pair of connecting members are prevented from contacting the power supply member or the power conversion member through the partition plate, and the LED is lifted. The safety of the luminaire. Moreover, the protection performance of the lamp tube can be achieved through the back plate, preventing external factors from affecting the luminous effect of the lamp tube, and the back plate is transmitted through The engaging members and the engaging holes are coupled to each other in a barb type, which facilitates the installation and replacement operations. In addition, when the LED lamps are arranged in plural, they can be electrically connected to each other through the plug to form a serial connection state, or a single LED lamp can be used as a power source, and power is supplied to the remaining electronic devices or devices through the socket. Etc., but can enhance the practicality of this creation.

1‧‧‧LED lamps

10‧‧‧Light tube

101‧‧‧LED components

102‧‧‧Second through hole

11‧‧‧End cover

111‧‧‧ first through hole

112‧‧‧ accommodating space

113‧‧‧ top shell

1131‧‧‧First Fixed Department

114‧‧‧ bottom case

115‧‧‧Cards

1151‧‧‧Top block

116‧‧‧Connecting Department

1161‧‧‧ rib

1162‧‧‧First arc

1163‧‧‧second arc

117‧‧‧ socket

118‧‧‧Wire

119‧‧‧ plug

12‧‧‧Power supply

13‧‧‧Power conversion parts

14‧‧‧ Backplane

141‧‧‧Snap hole

15‧‧‧Baffle

151‧‧‧Second fixed department

16‧‧‧ switch

2‧‧‧Connecting parts

3‧‧‧External power supply

4‧‧‧Electronic equipment

FIG. 1A is an exploded perspective view (1) of the preferred embodiment of the present invention.

Figure 1B is an exploded view of the preferred embodiment of the present invention (2)

Fig. 2 is a schematic view showing the assembly of the preferred embodiment of the present invention.

Figure 3 is a cross-sectional view showing a preferred embodiment of the present invention.

Figure 4 is a schematic view (1) of the application of the preferred embodiment of the present invention.

Figure 5 is a schematic diagram of the application of the preferred embodiment of the present invention (2).

Figure 6 is a schematic view showing the application of another embodiment of the preferred embodiment of the present invention.

In order for your review board to have a clear understanding of the content of this creation, please use the following instructions to match the drawings.

Please refer to FIGS. 1A-1B, 2, 3 and 4~5, which are schematic diagrams, assembly diagrams, cross-sectional views and schematic diagrams of respective applications of the preferred embodiment of the present invention. The present invention discloses an LED luminaire 1 that can be used to hang or mount on an indoor space ceiling for illumination. The LED lamp 1 has a lamp tube 10 and a two-end cover 11 . The lamp tube 10 is internally provided with an LED assembly 101. The end caps 11 are respectively connected to the two ends of the lamp tube 10 and are provided for accommodating a power supply member. 12 or a power conversion member 13, the end covers 11 respectively have a first through hole 111 To connect a connector 2, the LED lamp 1 can be suspended or mounted through the connectors 2.

The LED lamp 1 is characterized in that it has a back plate 14 which is disposed on one side of the lamp tube 10 and has a plurality of engaging holes 141 for being assembled with the end caps 11 . In this embodiment, the back plate 14 is provided with two symmetrically disposed engaging holes 141 corresponding to the position of the end cover 11 as an example. The back panel 14 is located on the backlight surface of the lamp tube 10, that is, the LED lamp 1 is close to the ceiling side to protect the lamp tube 10, and the back plate 14 can also be made of a metal material. Improve the heat dissipation efficiency of the LED lamp 1 when it is used.

Each of the end covers 11 is a rectangular structure and has an accommodating space 112. The accommodating space 112 is provided with a partition 15 for preventing the power supply member 12 or the power conversion member 13 from transmitting through the first through hole. The hole 111 is in contact with the connecting member 2. In the present embodiment, the power supply member 12 is disposed in one of the accommodating spaces 112, the power conversion member 13 is disposed in the other accommodating space 112, and the power supply member 12 and the power conversion member 13 are provided. The system is electrically connected to the LED assembly 101, but the creation is not limited thereto. Wherein, the end caps 11 are arranged in a rectangular shape, which can greatly improve the space utilization rate compared with the conventional lamp tube end cover, especially in the current integrated lamp tube lamps, and many electronic components must be installed on the end caps. In the eleventh, the LED assembly 101 of the lamp tube 10 is also electrically connected to the LED assembly 101. Therefore, the power supply member 12 and the power conversion member 13 can be more conveniently disposed through the end caps 11 of the creation rectangle. Or even the rest of the electronic components to be added.

Since the pair of end caps 11 of the present invention are not integrally sealed, the first through holes 111 are directly opened in the pair of end caps 11, and the connecting members 2 are respectively transmitted through the first through holes 111. The power supply member 12 and the power conversion member 13 are connected to the end cover 11, and the power supply member 12 and the power conversion member 13 are electronic components. Therefore, when the LED lamp 1 is used, the LED lamp 1 is energized. The situation that the power supply member 12 or the power conversion member 13 is in contact with the connecting member 2 can be effectively prevented from occurring, thereby avoiding the occurrence of a wire fire or a short circuit of the power supply member 12 or the power conversion member 13, especially considering such a situation. The connecting member 2 is often made of a metal material, and therefore, it is important for how to effectively isolate the power feeding member 12 or the power conversion member 13 from contacting the connecting members 2. The structural design considerations.

In addition, each of the end covers 11 has a top case 113 and a bottom case 114. The top case 113 and the bottom case 114 are oppositely disposed and combined to form the end cover 11, and the top case 113 is located on the LED lamp 1. The top side of the top case 114 is disposed adjacent to the back plate 14. The bottom case 114 is oppositely disposed on the bottom side of the top case 113, thereby facilitating the provision of the power supply member 12 or the power conversion member 13. In order to fix the partitions 15, the inner side surfaces of the end caps 11 have a plurality of first fixing portions 1131, and the partition plates 15 have a plurality of second fixing portions 151 corresponding to the first fixing portions 1131, so that the The partition plate 15 and the end cover 11 are closely arranged with each other. Preferably, the first fixing portion 1131 is located on the inner side surface of the top case 113, so that the partition plate 15 can be disposed adjacent to the top case 113 to raise the accommodating space 112 for mounting components. The first fixing portion 1131 can be a groove or a protrusion, and the second fixing portion 151 is corresponding to the first fixing portion as a bump or a groove to be closely engaged with each other. In the embodiment, the first fixing portion 1131 is a groove, and the second fixing portion 151 is a bump as an example. However, this is a preferred embodiment of the creation, and the creation is not limited to this.

Each of the end caps 11 and the corresponding engaging holes 141 are provided with a plurality of engaging members 115. Each of the engaging members 115 is disposed in the corresponding engaging hole 141 and is formed in a barbed state to assemble the ends. Cover 11 and the back plate 14. One end of the engaging member 115 is formed with a top abutting portion 1151, and the engaging members 115 are J-shaped or L-shaped, and the engaging members 115 are inserted through the engaging holes 141. The top abutting portion 1151 and the back plate 14 form a card barb. In the embodiment, the engaging members 115 are disposed in two equal numbers of the engaging holes 141. When the back cover 14 and the end cover 11 are to be combined, the engaging members 115 may be firstly engaged from one side of the back plate 14 to facilitate the top abutting portions 1151 and the back. The other side of the plate 14 is snapped to form a barb to prevent the back plate 14 from being detached from the end caps 11. Therefore, the back plate 14 can be easily disassembled or assembled, and the barbs formed by the top abutting block 1151 relative to the back plate 14 can be used to improve the bonding strength between the back plate 14 and the end caps 11. .

The pair of connecting members 2 are slings or screws in a visually mounted state such that the LED luminaire 1 is passed through the pair of connecting members 2 to suspend or secure the area to be mounted. In this embodiment, the pair of connecting members 2 are slings as an example. Preferably, the first through holes 111 are respectively located at the top case 113, and one of the first through holes 111 is tapered toward one side, and the other first through hole 111 is oriented toward the first through hole 111. The two sides are tapered to assemble the connector 2. As shown in FIG. 1 , one of the first through holes 111 is in the form of a circular hole on one side and is tapered toward the other side to form a slightly elliptical hole, so that the pair of connecting members 2 can be made of circular holes. The side is inserted into the first through hole 111 and then moved to the tapered side so that the pair of connecting members 2 can be respectively locked with the top case 113. Similarly, the center of the other first through hole 111 is a circular hole and is gradually tapered toward the two sides to form a slightly elliptical hole, and the connecting member 2 is also disposed from the center into the first through hole 111, and Moving toward one of the tapered sides to form a snap-fit state with the top case 113. Wherein, the first through holes 111 are tapered toward one side or two sides, and the tapered directions are all on the same straight line. The requirements for the LED lamp 1 to be mounted on the ceiling through the pair of connectors are also different based on different installation methods or aspects. For example, when the LED lamp 1 is mounted in a suspension manner, the pair of connectors 2 are connected to each other. The pair of end caps must be in a state of parallel symmetry to avoid skewing the LED lamp 1 after suspension. Therefore, after the pair of connecting members 2 are placed in the first through hole 111, the tapered ends of the first through holes 111 are respectively slid in opposite directions, and if the LED lamp 1 is installed in other manners, When the pair of connecting members 2 are locked against the tapered end of the first through hole 111, the first through hole 111 which is tapered toward the two sides is tapered with the other side only toward the other side. The first through hole 111 can simultaneously satisfy the above different requirements.

Each of the end caps 11 is formed with a connecting portion 116, and the engaging members 115 are located at the connecting portion 116. Since the bulbs 10 are circular, each connecting portion 116 is annular and The inner side surface has a plurality of ribs 1161, and the two ends of the tube 10 respectively have a plurality of second through holes 102 corresponding to the ribs 1161, thereby being engaged with the ribs 1161. Therefore, when the lamp tube 10 and the pair of end caps 11 are assembled, the lamp tube 10 and the pair of end caps can be quickly and easily connected by simply engaging the ribs 1161 into the second through holes 102. 11. In this embodiment, since the pair of end caps 11 are respectively formed by the top case 113 and the bottom case 114, the connecting portion 116 can have a first arc portion 1162 and a second portion. An arc portion 1163, the first arc portion 1162 is located at the top case 113, and the second arc portion 1163 is located at the bottom case 114. The first arc portion 1162 is connected after the top case 113 is connected to the bottom case 114. And the second arc portion 1163 can form the connecting portion 116 in a ring shape. In addition, since the top case 113 is located adjacent to the back plate 14, the engaging members 1151 are respectively located at the first arc portion 1162 formed by each of the top cases 113 to facilitate assembly of the back plate 14 .

Any one of the end covers 11 can be provided with a socket 117, and the socket 117 is electrically connected to the power conversion member 13. In addition, a wire 118 and a plug 119 can be extended to the end cover 11 , and the plug 119 is electrically connected to the power supply member 12 through the wire 118 . After the LED lamp 1 is mounted on the ceiling, the LED lamp 1 and the outside can be made through the plug 119. The power supply 3 is connected to obtain power for the LED assembly 101 to generate light for illumination. Thereby, the LED lamp 1 can achieve the function of quick installation and use, and in addition to simplifying the installation process, the LED lamp 1 has a certain degree of convenience in use, and does not need to pass through complicated electric wire-drawing action to reach the power supply state. One of the sockets 117 of the end cover 11 is provided for the user to arbitrarily connect one of the remaining electronic devices 4 or an electric appliance, so that the LED lamp 1 can be further powered as a power source to the remaining devices, or can be permeable. The socket 117 and the plug 119 enable the LED lamp 1 to be disposed in series.

In addition, the present invention further has a switch 16 disposed on one of the end caps 11 and electrically connected to the power supply member 12. Preferably, the switch 16 can be a sling chain switch. The user adjusts the illumination state of the LED lamp 1. Since the LED lamp 1 can be electrically connected to the external power source 3 through the plug 119, the user only needs to control the LED lamp 1 through the switch 16. Moreover, since the hanging chain switch descends from the end cover 11, the LED lamp 1 is mounted on the ceiling and has a vertical distance from the ground, and the switch type is more convenient for the user to control the LED lamp 1 .

As shown in FIG. 4, in actual application, the lamp tube 10 and the pair of end caps 11 are first assembled through the connecting portions 116, and then the engaging members 115 on the pair of end caps 11 are passed through. The back plate 14 is assembled to the pair of end covers 11 to cover the backlight side of the lamp tube 10. Then, the LED lamp 1 can be mounted to the ceiling through a suspension or other manner according to the state of the installation area, and the LED lamp 1 can be electrically connected to the external power source 3 through the plug 119. Indoor lighting, as shown in Figure 4, is a suspension installation. In addition, as described above, the LED lamp 1 can be further electrically connected to the remaining electronic devices through the socket 117 to provide power supply effects. In the embodiment, the LED lamp 1 is powered to the electronic device. For example, an emergency light is taken as an example, as shown in FIG.

Please refer to FIG. 6, which is a schematic diagram of another embodiment of the preferred embodiment of the present invention. In this embodiment, another type of installation and use of the LED lamp 1 is disclosed. The pair of connecting members 2 can be respectively a screw, and one end thereof is fixed at a predetermined installation position of the ceiling, when the LED lamp 1 is integrally After the components are assembled as described above, the other ends of the pair of connecting members 2 can be respectively inserted into the first through hole 111 and traversed by the LED lamp 1 to move the pair of connecting members 2 to the first through. The hole 111 is tapered to form a fixed joint. The LED lamp 1 can also be disposed in a plurality of indoors, and can be connected to each other through the plug 119 and the socket 117. It is not necessary for each of the LED lamps 1 to be connected to the external power source 3 to improve the actual use. Convenience.

In summary, the LED lamp 1 of the present invention transmits the pair of end caps 1 of the rectangular shape, effectively improving the component setting space of the integrated lamp tube lamp, and improving the space utilization rate of the pair of end caps 11. And one end of the pair of connecting members 2 can be directly disposed on the pair of end covers 11 to facilitate hanging or mounting the LED lamp 1. Based on the safety considerations, the present invention further prevents the power supply member 12 or the power conversion member 13 in the pair of end covers 11 from contacting the pair of connecting members 2 via the first through holes 111, so as to avoid Short circuit or even wire fire. In addition, the present invention has the back panel 14 for improving the physical properties of the LED lamp 1 and the performance of protecting the lamp tube 10 in installation and use, and the assembly of the back plate 14 and the pair of end covers 11 The hooking member 115 is hooked to the engaging holes 141 of the backing plate 14 by means of the hooking member 115, thereby facilitating replacement of the backing plate 14 and maintenance thereof in addition to being quick and easy to assemble. . Moreover, after the LED lamp 1 of the present invention is electrically connected to the external power source 3 through the plug 119, a plurality of the LED lamps 1 can be further connected in series or as a power source through the socket 117 provided thereon. Current is supplied to other electrical or electronic devices to enhance the utility of the LED lamp 1.

However, the above descriptions are only for the preferred embodiment of the present invention and are not intended to limit the scope of the present invention; therefore, the equivalent changes and modifications made without departing from the spirit and scope of the present invention should be Within the scope of this creation's patent.

10‧‧‧Light tube

101‧‧‧LED components

102‧‧‧Second through hole

11‧‧‧End cover

111‧‧‧ first through hole

113‧‧‧ top shell

114‧‧‧ bottom case

115‧‧‧Cards

116‧‧‧Connecting Department

1161‧‧‧ rib

1162‧‧‧First arc

1163‧‧‧second arc

117‧‧‧ socket

118‧‧‧Wire

119‧‧‧ plug

12‧‧‧Power supply

13‧‧‧Power conversion parts

14‧‧‧ Backplane

141‧‧‧Snap hole

15‧‧‧Baffle

16‧‧‧ switch

2‧‧‧Connecting parts

Claims (12)

An LED lamp having a lamp tube and a two-end cover, wherein the lamp tube is internally provided with an LED assembly, and the end caps are respectively connected at two ends of the lamp tube for accommodating a power supply member or a power conversion component. And the power supply component and the power conversion component are respectively electrically connected to the LED component, and the end covers respectively have a first through hole for assembling a connector to suspend or mount the LED lamp, the LED lamp The LED lamp further has a back plate disposed on one side of the lamp tube and having a plurality of engaging holes to be combined with the end caps; each of the end caps is a rectangular structure and An accommodating space is disposed in the accommodating space for preventing the power supply member or the power conversion member from contacting the connecting member through the first through hole, and each of the end covers is correspondingly engaged The hole is provided with a plurality of engaging members, each of the engaging members is disposed in the corresponding engaging hole and formed in a barbed state to assemble the end caps and the back plate. The LED lamp of claim 1, wherein one of the ends of the engaging members is extended to form a top abutting portion, so that the engaging members are L-shaped or J-shaped, and the engaging members are respectively disposed. After the engaging hole is formed, the top abutting portion forms a latching state with the back plate. The LED lamp of claim 2, wherein the inner side of each of the end caps has a plurality of first fixing portions, and the partitions have a plurality of second fixing portions corresponding to the first fixing portions A fixing portion is fixed to each other. The LED lamp of claim 3, wherein each of the end caps has a top case and a bottom case, the top case and the bottom case are oppositely disposed and combined to form the end cap, and the A fixing portion is located in each of the top cases. The LED lamp of claim 4, wherein the first fixed part is divided into The second fixing portion is a convex portion or a concave portion, respectively, corresponding to the first fixing portion. The LED lamp of any one of claims 1 to 5, wherein any one of the end caps is provided with a wire and a plug, and the plug is electrically connected to the power supply member through the wire. The LED lamp of claim 6, wherein any one of the end caps is provided with a socket, and the socket is electrically connected to the power conversion component. The LED lamp of claim 7, further comprising a switch disposed at one of the end caps and electrically connected to the power supply member. The LED lamp of claim 8, wherein the open relationship is a sling chain switch. The LED lamp of claim 1, wherein the back plate is made of a metal material. The LED lamp of claim 4, wherein the first through holes are respectively located in the top case, and one of the first through holes is tapered toward one side, and the other one is The first through hole is tapered toward the two sides to assemble the connecting member. The LED lamp of claim 1, wherein each of the end caps extends to form a connecting portion, and the engaging members are located at the connecting portion, and the connecting portions are annular and on the inner side. The utility model has a plurality of ribs, and the two ends of the lamp tube respectively have a plurality of second through holes corresponding to the ribs to be engaged with the ribs.