JP6185310B2 - Cover mounting mechanism and lighting device - Google Patents

Description

  The present invention relates to a cover attachment mechanism for attaching a cover to a housing, and more particularly, to a cover attachment mechanism for a lighting device including a light source such as an LED (Light Emitting Diode).

2. Description of the Related Art In recent years, lighting devices such as light bulb-type LED lamps that use LEDs with long lifetimes and low power consumption as light sources have been adopted.
In adopting a bulb-type LED lamp, it is required that the mounting structure of the metal housing to which the LED is mounted and the cover (also referred to as a globe) covering the LED can withstand the long life of the lighting device. Yes.

As a prior art, an attachment structure in which the cross-sectional shape of the opening edge portion of the globe is made into a hook shape is disclosed (see Patent Document 1).
Moreover, the illuminating device provided with a fall prevention means and a rotation prevention means is disclosed (refer patent document 2).

JP 2010-205645 A JP 2010-146952 A

In the lighting device of Patent Document 1, the glove is difficult to come off from the adhesive by making the cross-sectional shape of the opening edge of the glove into a bowl shape. However, since there is no means for mechanically engaging the globe and the holder and means for spreading the adhesive over a wider range, there is a problem that the globe is pulled out due to deterioration of the adhesive over time.
In the illumination device of Patent Document 2, since the position of the emission surface of the metal main body is deepened and the engagement means with the cover is provided on the wall surface around the emission surface, the peripheral portion of the metal main body prevents light distribution. There is a problem that light distribution efficiency is reduced.

  An object of this invention is to provide the cover attachment mechanism which can improve the light distribution efficiency of a light source, and can join a cover and a metal housing more reliably.

  The cover mounting mechanism according to the present invention includes a mounting portion having a cover mounting portion in which an annular groove portion having a bottom portion is formed, and a cover attached to the cover mounting portion, and a cylindrical mounting inserted into the groove portion. A cover having a cylindrical portion and an annular fixing portion provided at an end of the mounting cylindrical portion, thicker than a thickness of the mounting cylindrical portion, fixed to the bottom portion, and having an uneven radial thickness It is characterized by providing.

  According to the cover mounting mechanism according to the present invention, for example, the position of the light source can be increased by arranging the light source inside the upper edge portion of the inner peripheral wall of the groove portion, so that the peripheral portion of the mounting portion distributes light. There is no hindrance, and the adhesive can be spread over a wide range in the vicinity of the fixing portion, so that the cover and the metal casing can be more reliably joined.

It is a front view of the illuminating device 500 which concerns on Embodiment 1. FIG. It is a perspective view of the illuminating device 500 which concerns on Embodiment 1, (a) is a perspective view of the state which isolate | separated the globe 100 from the metal housing | casing 200, (b) is an attachment part of the metal housing 200 and the globe 100. It is a partial expansion perspective view of a certain cover attachment mechanism 510. 2 is a perspective view of a metal housing 200 and an LED substrate 250 according to Embodiment 1. FIG. It is a figure which shows the metal housing | casing 200 which concerns on Embodiment 1, (a) is a top view of the metal housing 200, (b) is AA sectional drawing of the metal housing 200 of (a). It is a figure which shows the globe 100 which concerns on Embodiment 1, (a) is a perspective view of the globe 100, (b) is a front view of the globe 100. It is a figure which shows the globe 100 which concerns on Embodiment 1, (a) is a bottom view of the globe 100, (b) is BB sectional drawing of the globe 100 of (a). 4 is a partially enlarged cross-sectional view for explaining a mounting structure between a mounting cylinder portion 120 and a mounting groove 220 according to Embodiment 1. FIG. It is a figure which shows the variation with the attachment cylinder part 120 which concerns on Embodiment 1, and the attachment groove | channel 220, (a) is when the taper is formed in the groove | channel outer peripheral wall 221 of the engagement convex part 130 and the attachment groove | channel 220, ( b) is a diagram showing a case where the tip of the engaging projection 130 is a curved surface. It is a cross-sectional partial enlarged view which shows the attachment structure of the attachment cylinder part 120 and attachment groove | channel 220 which concern on Embodiment 1, (a) is a figure which shows an attachment process, (b) is a figure which shows after attachment. It is. It is a perspective view of the glove | globe 100a which concerns on Embodiment 2. FIG. It is a bottom view of the globe 100a according to the second embodiment. FIG. 10 is a partially enlarged cross-sectional view for explaining an engagement structure between a mounting cylinder portion 120 of a globe 100a and a mounting groove 220 of a metal housing 200 according to Embodiment 2. FIG. 6 is a partial enlarged cross-sectional view showing an engagement structure between an attachment tube portion 120 of a globe 100a and an attachment groove 220 of a metal housing 200 according to Embodiment 2. It is a schematic diagram which shows the CC cross section of FIG. It is a figure which shows the variation of the attachment structure of the attachment cylinder part 120 and the attachment groove | channel 220 which concern on Embodiment 3, (a) is a variation A, (b) is a figure which shows the variation B. It is a figure which shows the attachment structure of the attachment cylinder part 120 and the attachment groove | channel 220 which concern on Embodiment 4, and is a figure which shows the case where the notch part 150 is provided in Fig.15 (a) (b).

In the following description of the embodiment, directions such as “up”, “down”, “left”, “right”, “front”, “rear”, “front”, “back” are as such for convenience of explanation. However, it is not intended to limit the arrangement or orientation of devices, instruments, parts, or the like.
In the following embodiments, for convenience of explanation, a direction in which light is irradiated (irradiation direction) will be described as an upper side (upper), and the opposite side will be described as a lower side (lower).

Embodiment 1 FIG.
FIG. 1 is a front view of lighting apparatus 500 according to the present embodiment. 2A and 2B are perspective views of the lighting device 500 according to the present embodiment, in which FIG. 2A is a perspective view in a state where the globe 100 is separated from the metal casing 200, and FIG. 2B is a perspective view of the metal casing 200 and the globe 100. It is a partial expansion perspective view of the cover attachment mechanism 510 which is an attachment part. The configuration of lighting apparatus 500 and cover mounting mechanism 510 according to the present embodiment will be described with reference to FIGS.

  As shown in FIG. 1, the lighting device 500 includes a globe 100, a metal housing 200, a resin housing 300, and a base 400. Illumination device 500 is, for example, a light bulb-shaped LED lamp.

As shown in FIG. 2A, the globe 100 is attached to the metal casing 200 so as to cover the LED substrate 250 attached to the metal casing 200. The globe 100 is an example of a cover.
As shown in FIG. 2A, the metal case 200 is attached with the LED substrate 250. An LED 251 is mounted on the LED substrate 250 as a light source.
In this embodiment, the lighting device 500 is described as including the LED 251 as a light source. However, the light emitting unit may be a laser diode, an organic EL (Electro-Luminescence), or the like. Further, the present embodiment can be applied even when the lighting device 500 includes other light sources such as an incandescent lamp, a fluorescent lamp, and a mini halogen lamp.

A portion shown as a resin casing 300 in FIG. 1 is a part of the resin casing 300. Although the entire resin casing 300 is not illustrated, the resin casing 300 is cylindrical and is accommodated in a cylindrical cavity (cavity 227 (see FIG. 4B)) formed inside the metal casing 200. The
A lighting device or the like in which some electronic components are mounted on a lighting circuit board is housed in the cylindrical shape of the resin casing 300 in order to light the LED 251. The end of the resin casing 300 on the base 400 side is exposed from the lower end of the metal casing 200 as shown in FIG.

  The base 400 is attached to the lower end of the resin casing 300. The base 400 is connected to a socket (not shown) that is electrically connected to an external power source, and supplies power to the lighting device housed inside the resin casing 300.

Next, the outline of the configuration of the cover mounting mechanism 510 will be described with reference to FIG. As illustrated in FIG. 2B, the lighting device 500 includes a cover attachment mechanism 510 that attaches the globe 100 to the metal housing 200.
The cover attachment mechanism 510 includes a metal casing 200 having a portion (cover attachment portion 220a) in which the attachment groove 220 is formed, and the globe 100 including the attachment cylinder portion 120 inserted into the attachment groove 220.

The metal housing 200 is formed with an annular mounting groove 220 (groove portion) whose upper side is opened around a portion to which the LED substrate 250 is mounted (a light source mounting portion 210 (see FIG. 3) described later). That is, an annular mounting groove 220 is formed surrounding the LED substrate 250.
An engagement recess 222 (recess) is formed in the groove outer peripheral wall 221 that is the outer peripheral wall of the mounting groove 220. The cover attachment portion 220a refers to a portion where the attachment groove 220 is formed.

The globe 100 includes a cylindrical mounting tube portion 120 that is inserted into the mounting groove 220. In addition, the globe 100 includes an engaging convex portion 130 (convex portion) that protrudes from the cylindrical outer peripheral surface 121 that is the outer peripheral surface of the mounting cylindrical portion 120. Further, the globe 100 includes a hook-shaped fixing portion 140 that protrudes outward from the outer peripheral surface 121 of the cylindrical portion at the end of the mounting cylindrical portion 120.
When the mounting cylinder portion 120 is inserted into the mounting groove 220, the engaging convex portion 130 engages with the engaging concave portion 222 formed in the mounting groove 220. Further, the fixing portion 140 is fixed to the groove bottom portion 223 that is the bottom portion of the attachment groove 220.

Next, the configuration of the metal casing 200 will be described with reference to FIGS. 3 and 4.
FIG. 3 is a perspective view of the metal casing 200 according to the present embodiment. 4A and 4B are diagrams showing the metal casing 200 according to the present embodiment, where FIG. 4A is a plan view of the metal casing 200, and FIG. 4B is a cross-sectional view taken along line AA of the metal casing 200 of FIG. It is.

The metal housing 200 is made of a metal having good thermal conductivity such as aluminum. However, it is not necessary to use a metal as long as it has a good thermal conductivity. The metal casing 200 is integrally formed by, for example, a die cutting method or the like.
As shown in FIGS. 3 and 4B, the metal housing 200 has a truncated cone shape with a larger area on the upper surface side than on the lower surface side. The metal casing 200 has a cylindrical cavity 227 formed therein.
The metal casing 200 includes a light source mounting part 210, a cover mounting part 220a in which a mounting groove 220 is formed, and fins 230. The metal housing 200 is an example of an attachment portion that includes a cover attachment portion 220a and a light source attachment portion 210.

  A plurality of fins 230 are provided on the side surface of the metal casing 200. The fin 230 dissipates heat generated by the LED 251 mounted on the LED substrate 250 attached to the light source attachment part 210, and prevents deterioration of components such as the LED 251 due to a temperature rise.

The light source mounting part 210 is provided on the upper surface side of the metal casing 200. The light source mounting part 210 has a circular light source mounting surface 213 that comes into contact with the LED substrate 250. The back surface of the mounting surface on which the LED 251 is mounted is bonded to the light source mounting surface 213 with an adhesive or the like, and the LED substrate 250 is screwed to the light source mounting portion 210.
The light source attachment part 210 includes an electric wire insertion hole 211 that communicates with the cavity 227 inside the metal housing 200 and allows a lead wire or the like to pass through the central part of the light source attachment surface 213. Further, two screw holes 212 are provided through which screws (not shown) for screwing the LED substrate 250 are passed. The screw hole communicates with a cavity inside the metal housing 200. Screws for screwing the LED substrate 250 are screwed to the resin casing 300 disposed in the cavity 227 through screw holes.

The LED substrate 250 is a circular substrate. The LED substrate 250 includes a substrate hole 252 through which a lead wire or the like passes in the center. Also, two board screw holes 253 for screwing are provided in the vicinity of the periphery on the same diameter. In addition, twelve LEDs 251 are mounted on the LED substrate 250 near the periphery. Six LEDs 251 are arranged on both sides of the diameter connecting the two board screw holes 253.
The shape of the LED substrate 250, the arrangement and number of the LEDs 251 can be appropriately changed based on the product specifications.

  The metal casing 200 includes an annular mounting groove 220 around the light source mounting portion 210. An attachment tube portion 120 (see FIGS. 2A and 2B) of the globe 100 is inserted into the attachment groove 220 to fix the globe 100 to the metal housing 200.

As shown in FIG. 4B, the mounting groove 220 includes an inner groove inner peripheral wall 224, an outer peripheral groove outer peripheral wall 221 (an example of a peripheral wall), and the groove inner peripheral wall 224 and the groove outer peripheral wall 221. It is formed from the groove bottom part 223 (bottom part).
In the vicinity of the upper edge of the groove outer peripheral wall 221, an engagement concave portion 222 is formed that is recessed outward in an annular shape along the groove outer peripheral wall 221. The engagement concave portion 222 engages with the engagement convex portion 130 formed on the attachment tube portion 120 of the globe 100.

  In this embodiment, the lighting device 500 having the circular light source mounting surface 213 is described. However, for example, a lighting device having a rectangular light source mounting surface, an elliptical light source mounting surface, or the like may be used. Further, the metal casing 200 is not limited to the truncated cone shape, and may be a cylindrical shape, an elliptical column shape, a rectangular column shape, or the like as long as an annular mounting groove 220 is formed around the light source mounting surface 213.

Next, the configuration of the globe 100 will be described with reference to FIGS. 5 and 6.
5A and 5B are diagrams showing the globe 100 according to the present embodiment, where FIG. 5A is a perspective view of the globe 100, and FIG. 5B is a front view of the globe 100. FIGS. 6A and 6B are diagrams showing the globe 100 according to the present embodiment, in which FIG. 6A is a bottom view of the globe 100 and FIG.

As shown in FIGS. 5A and 5B, the globe 100 is attached to the light transmitting portion 110 that covers the LED substrate 250 and transmits the light emitted from the LED 251 and the mounting groove 220 of the metal housing 200. A cylindrical portion 120.
The light transmission part 110 is formed of a transparent or translucent resin. As the resin, for example, a material such as polycarbonate or acrylic is selected according to product specifications. The light transmitting portion 110 has a shape in which a resin having a predetermined plate thickness is formed into a spherical shape and a part of the lower side is opened. The light transmission unit 110 transmits light emitted from the LED 251 from the inside of the sphere to the outside.
The light transmission unit 110 may have a function of diffusing, condensing, and reflecting light according to product specifications. With respect to these functions, a diffusion layer (or a diffusion surface), a lens, a reflection layer (or a reflection surface), etc. are formed when molding the resin that is the base material of the light transmission part 110, and the base material itself has this function. You may make it have directly, and may implement | achieve by methods, such as bonding another members, such as an optical film which has the said function, on the surface of a base material.
Note that the shape of the light transmitting portion 110 is not limited to a spherical shape, and may be a hemispherical shape, a long spherical shape, a rectangular parallelepiped shape, a dome shape, or the like as long as it covers the light source mounting portion 210.

  As shown in FIG. 5A, the mounting cylinder 120 is a part formed so that the edge of the opening of the light transmission part 110 protrudes in a cylindrical shape. The mounting cylinder 120 is formed of a resin plate having a predetermined thickness. The light transmission part 110 and the mounting cylinder part 120 are integrally formed. However, the attachment cylinder part 120 does not need to transmit light. Out of the peripheral surfaces of the mounting cylinder portion 120, the outer peripheral surface is a cylindrical portion outer peripheral surface 121, and the inner peripheral surface is a cylindrical portion inner peripheral surface 122.

  As shown in FIG. 5 (b), the globe 100 has an annular fixing portion 140 that is formed at the lower end portion of the mounting tube portion 120 to be thicker than the wall thickness of the mounting tube portion 120 (see FIG. 6 (b)). Is provided. Here, the thickness refers to the thickness in the radial direction (see FIG. 6B). The fixed portion 140 has a shape in which a portion thicker than the thickness of the mounting tube portion 120 protrudes from the tube portion outer peripheral surface 121. The fixing part 140 has, for example, a bowl shape in which the lower end of the mounting cylinder part 120 protrudes outward.

  Further, the globe 100 includes an engagement convex portion 130 protruding from the cylindrical portion outer peripheral surface 121 of the mounting cylindrical portion 120. A predetermined number of engaging convex portions 130 are formed on the same circumference of the cylindrical outer peripheral surface 121. The plurality of engaging protrusions 130 are provided in a line at equal intervals on the cylindrical outer peripheral surface 121.

For example, as illustrated in FIG. 6A, four engagement convex portions 130 are formed on the same circumference of the cylindrical portion outer peripheral surface 121 with equal intervals. In addition, it is preferable that three or more engagement convex portions 130 are formed at equal intervals on the same circumference of the cylindrical portion outer peripheral surface 121. The number of the engaging protrusions 130 may be five, six, or eight as long as it is three or more, but four is more preferable.
This is because by providing the four engaging convex portions 130 at equal intervals on the same circumference of the outer peripheral surface 121 of the cylindrical portion, the strength of the holding force between the mounting cylindrical portion 120 and the mounting groove 220 can be increased. This is because it can be made uniform over the circumference. Thereby, even when the years of use have elapsed in the lighting device 500, it is possible to obtain a stable lighting device 500 that is less likely to cause rattling or the like. Moreover, in the case of four, the engagement convex part 130 should just be provided in the both ends of two orthogonal diameters of the cylinder part outer peripheral surface 121, and a manufacturing operation becomes easy.

As shown in FIG. 5A, the engaging convex portion 130 is a flat plate piece having a predetermined plate thickness and a predetermined plate width. The engagement convex portion 130 is formed so as to be bent in the insertion direction of the mounting cylinder portion 120 and the direction opposite to the insertion direction (that is, the vertical direction).
As shown in FIG. 6A, when the globe 100 is viewed from below, the convex tip 131 of the engaging convex portion can be seen from the outside of the outer peripheral tip 141 of the fixing portion 140. As shown in FIGS. 6A and 6B, the length from the cylindrical outer peripheral surface 121 to the convex tip 131 of the engaging convex 130 is from the cylindrical peripheral 121 to the outer peripheral 141 of the fixed portion 140. It is formed to be longer than the length.

As shown in FIG. 6 (a), the plate width of the engaging projection 130 is L11, and as shown in FIGS. 6 (a) and 6 (b), the diameter of the cylindrical outer peripheral surface 121 of the mounting cylinder 120 is L10. To do.
At this time, the plate width L11 is preferably 1/25 to 1/18 of the diameter L10 of the cylindrical portion outer peripheral surface 121. The plate width L11 may be 1/30 to 1/15 of the diameter L10. In particular, the plate width L11 is most preferably 1/22 to 1/20 of the diameter L10 of the cylindrical portion outer peripheral surface 121.

Next, the shape of the attachment cylinder part 120 and the attachment groove 220 and the attachment structure of the attachment cylinder part 120 and the attachment groove 220 will be described with reference to FIGS.
FIG. 7 is a partially enlarged cross-sectional view for explaining a mounting structure between the mounting cylinder 120 and the mounting groove 220 according to the present embodiment. FIG. 8 is a view showing variations of the mounting cylinder portion 120 and the mounting groove 220 according to the present embodiment. FIG. 8A shows a case where the engagement convex portion 130 and the groove outer peripheral wall 221 are tapered ( b) is a diagram showing a case where the tip of the engaging projection 130 is a curved surface. FIG. 9 is an enlarged sectional view showing a mounting structure of the mounting tube portion 120 and the mounting groove 220 according to the present embodiment, (a) is a diagram showing the mounting process, and (b) is a diagram after mounting. FIG.

  The view of the mounting cylinder 120 shown in FIG. 7 is an enlarged schematic view of the D portion of FIG. Moreover, the figure of the attachment groove 220 vicinity shown in FIG. 7 is the schematic diagram which expanded the state by which the LED board 250 is attached to the C section of FIG.4 (b).

First, the shapes of the engaging convex part 130 and the fixing part 140 will be described with reference to FIG.
As shown in FIG. 7, the thickness of the engaging convex portion 130 is L12, and the depth is L13. The plate width of the engaging convex portion 130 is L11 as described with reference to FIG. At this time, the ratio of L11 (plate width): L12 (plate thickness): L13 (depth) is most preferably about 5: 2: 4.
Note that the ratio of L11: L12: L13 of the engaging convex portion 130 is not limited to about 5: 2: 4, and other ratios may be used as long as the engaging convex portion 130 can bend in the vertical direction.

  As shown in FIG. 7, the engaging convex portion 130 and the fixing portion 140 have a length L13 (depth of the engaging convex portion 130) from the cylindrical outer peripheral surface 121 to the convex portion tip 131 of the engaging convex portion 130. The length L2 (depth of the fixing portion 140) from the outer peripheral surface 121 of the cylinder portion to the outer peripheral tip 141 of the fixing portion 140 is longer by L3 = (L13−L2).

Assuming that the plate thickness of the mounting cylinder portion 120 is L1, L13 (depth of the engaging convex portion 130), L2 (depth of the fixing portion 140), and L1 (plate thickness of the mounting cylinder portion 120) have the following relationship. Have.
On the premise that L2 <L13, L2 is preferably 2/3 to 1 times L1, and L13 is preferably 4/5 to 6/5 times L1. In particular, it is most preferable that L2 is 2/3 times L1 and L13 is 14/15 times L1. That is, L1: L2: L13 is most preferably about 1.5: 1: 1.4.

  As shown in FIG. 7, when the thickness of the fixing part 140 is L4, the thickness L4 of the fixing part 140 is preferably 2/3 to 13/10 times the depth L2 of the fixing part 140. In particular, the thickness L4 is most preferably equal to the depth L2.

Next, the shape near the mounting groove 220 will be described with reference to FIG.
As shown in FIG. 7, the LED substrate 250 is attached to the light source attachment surface 213 of the light source attachment portion 210. An LED 251 is mounted on the LED substrate 250.
An upper edge portion of the groove outer peripheral wall 221 of the mounting groove 220 is a groove outer peripheral wall upper edge portion 226, and an upper edge portion of the groove inner peripheral wall 224 of the mounting groove 220 is a groove inner peripheral wall upper edge portion 225. As shown in FIG. 7, the difference in height between the position of the groove outer peripheral wall upper edge 226 and the position of the groove inner peripheral wall upper edge 225 is L5.

The light source attachment surface 213 is a surface formed inside the groove inner peripheral wall upper edge 225.
Here, the height from the light source mounting surface 213 to the upper end of the LED 251 is L6. That is, L6 is the length from the back surface of the mounting surface of the LED substrate 250 to the upper end portion of the LED 251.
At this time, it is most preferable that L6 = L5. Thereby, the height L6 from the light source mounting surface 213 to the upper end portion of the LED 251 and the height difference L5 between the groove inner peripheral wall upper edge 225 and the groove outer peripheral wall upper edge 226 become the same, and the light emitted from the LED 251 The light distribution is not hindered by the upper edge 226 of the groove outer peripheral wall.

In order to set L6 = L5, the metal casing 200 is formed so that the light source mounting surface 213 of the light source mounting portion 210 is positioned L6 lower than the groove outer peripheral wall upper edge 226 (the base 400 side). To do.
Thus, by setting the light source mounting surface 213 below the groove outer peripheral wall upper edge 226, the process of forming the engagement recess 222 in the process of manufacturing the metal casing 200 is facilitated. The effect of improving the workability of manufacturing can be expected. In addition, there are effects such as weight reduction of the metal casing 200 and manufacturing cost reduction. Furthermore, the upper end portion of the LED 251 from the light source mounting surface 213 and the groove outer peripheral wall upper edge portion 226 have the same height, and the light distribution efficiency of the light emitted from the LED 251 can be improved.

  In the above description, it is preferable that the height from the light source mounting surface 213 in the upper end portion of the LED 251 and the groove outer peripheral wall upper edge portion 226 is the same, but it is not necessarily the same. The upper end portion of the LED 251 may be positioned higher than the upper edge portion 226 of the groove outer peripheral wall. In this case, the LED 251 enters the inside of the globe 100, but the LED 251 does not enter the inside of the globe 100 excessively and does not cause an excessive temperature rise inside the globe 100. In addition, the LED 251 may be lower than the groove outer peripheral wall upper edge 226 if slightly. However, the light distribution of the LED 251 is not limited.

Next, the variation of the attachment cylinder part 120, the attachment groove | channel 220, and a shape is demonstrated using FIG.
As shown in FIG. 8A, the engagement convex portion 130 may include a cylindrical portion-side tapered portion 1311 in which a corner portion below the convex portion tip 131 is cut. Further, the mounting groove 220 may include a groove-side taper portion 2261 obtained by cutting the groove outer peripheral wall upper edge portion 226.
It is preferable that the mounting cylinder portion 120 is easily inserted into the mounting groove 220 and is not easily removed from the mounting groove 220. By providing the cylinder side taper part 1311 and the groove side taper part 2261, the attachment cylinder part 120 can be easily inserted into the attachment groove 220. Even if only one of the cylinder side taper part 1311 and the groove side taper part 2261 is provided, the attachment cylinder part 120 can be easily inserted into the attachment groove 220.
Further, the corner portion (P1 portion) above the engaging convex portion 130 and the corner portion (P2 portion) above the engaging concave portion 222 preferably have corner shapes. Thereby, it becomes a structure where the attachment cylinder part 120 cannot be easily removed from the attachment groove 220.

  As shown in FIG. 8B, the convex tip 131 of the engaging convex 130 may be a curved surface. By making the convex portion tip 131 a curved surface, the mounting cylinder portion 120 has a structure that is easily removed from the mounting groove 220. However, when the convex tip 131 is a curved surface, it is possible to reduce an impact when the engaging convex portion 130 rattles in the engaging concave portion 222.

Next, the attachment structure of the attachment cylinder part 120 and the attachment groove | channel 220 is demonstrated using FIG.7 and FIG.9.
As shown in FIG. 7, before inserting the mounting cylinder 120 into the mounting groove 220, an adhesive member 260 such as a viscous adhesive is dropped in advance on the groove bottom 223 of the mounting groove 220. The adhesive member 260 is, for example, a silicon adhesive. In this state, the mounting cylinder 120 is inserted into the mounting groove 220.

As shown in FIG. 9A, the width of the mounting groove 220 is L7, and the depth of the engaging recess 222 is L8.
The width L7 of the mounting groove 220 is slightly longer than the radial thickness (L1 + L2) of the fixing portion 140, and when the fixing portion 140 is inserted into the mounting groove 220, the width L7 is increased between the outer peripheral side and the inner peripheral side of the fixing portion 140. The length is such that a slight gap is generated. As shown in FIG. 9B, a slight gap generated between the outer peripheral side and the inner peripheral side is defined as a gap 229.
The depth L8 of the engaging recess 222 is longer than the difference L3 between the protrusion tip 131 and the outer periphery tip 141 of the fixing portion 140.

  Further, the length (L1 + L13) from the cylindrical inner peripheral surface 122 to the convex portion tip 131 is formed longer than the width L7 of the mounting groove 220. Therefore, as shown in FIG. 9A, when the mounting tube portion 120 is inserted into the mounting groove 220, the engaging convex portion 130 protrudes outward from the groove outer peripheral wall 221 of the mounting groove 220. Therefore, in the process of inserting the mounting cylinder 120 into the mounting groove 220, the convex tip 131 of the engaging convex 130 is caught by the groove outer peripheral wall upper edge 226 of the groove outer peripheral wall 221 of the mounting groove 220 (FIG. 9A). )reference).

In the state of FIG. 9A, when the mounting cylinder part 120 is press-fitted into the mounting groove 220, the engagement convex part 130 bends in the direction opposite to the insertion direction of the mounting cylinder part 120, and the mounting cylinder part 120 further enters the mounting groove 220. Inserted.
When the mounting cylindrical portion 120 is inserted until the engaging convex portion 130 reaches the position of the engaging concave portion 222, the engaging convex portion 130 fits into the engaging concave portion 222, and the bending of the engaging convex portion 130 is released. The mating convex portion 130 and the engaging concave portion 222 are engaged (see FIG. 9B).

At this time, the fixing portion 140 is inserted to the vicinity of the groove bottom portion 223 where the adhesive member 260 is dropped.
As shown in FIG. 9B, the adhesive member 260 is pushed out by the fixing portion bottom surface 142 of the fixing portion 140 and moves upward in the gaps 229 on the inner peripheral side and the outer peripheral side of the fixing portion 140. At this time, the adhesive member 260 adheres to the fixing portion bottom surface 142, the outer end surface 143, and the inner surface 144 of the fixing portion 140. And the fixing | fixed part 140 has the groove | channel outer peripheral wall 221, the groove | channel inner peripheral wall 224, the groove | channel bottom part 223 via the adhesive member 260 adhering to the fixing | fixed part bottom face 142, the outer end surface 143, and the inner surface 144. Fixed to.

  As described above, according to the cover attachment mechanism 510 according to the present embodiment, the adhesive member 260 adheres to the fixed portion bottom surface 142, the outer end surface 143, and the inner surface 144, and the fixed portion 140 is attached to the groove outer peripheral wall 221. Since it adheres to the groove inner peripheral wall 224 and the groove bottom 223, the adhesive force can be further increased. Usually, in the bonding using an adhesive, the adhesive strength when bonding surfaces to each other with an adhesive is particularly strong. In the present embodiment, since the adhesion between the surfaces having particularly strong adhesive force is performed in three directions, stronger adhesive force can be exhibited.

  Furthermore, according to the cover attachment mechanism 510 according to the present embodiment, the engagement convex portion 130 and the engagement concave portion 222 are mechanically engaged, so that the globe 100 is more securely fixed to the metal housing 200. The

Furthermore, according to the cover attachment mechanism 510 according to the present embodiment, even when the adhesive force is weakened due to the deterioration of the adhesive member 260 over time, the glove is retained by the mechanical holding of the engagement convex portion 130 and the engagement concave portion 222. Since 100 does not come off from the metal casing 200, the highly safe lighting device 500 can be provided.
The mechanical holding force between the engaging convex portion 130 and the engaging concave portion 222 is preferably in the following range. It is preferable that the holding force when removing the globe 100 from the fixed metal housing 200 can hold up to twice or more the weight of the globe 100. Moreover, it is preferable that the holding force when removing the metal casing 200 from the fixed globe 100 is not more than three times the weight of the metal casing 200.
That is, the holding force is preferably not less than twice the weight of the globe 100 and not more than three times the weight of the metal casing 200.

  Furthermore, according to the cover mounting mechanism 510 according to the present embodiment, the height L6 from the back surface of the LED substrate 250 to the upper end portion of the LED 251 and the height difference L5 between the light source mounting surface 213 and the upper edge portion 226 of the groove outer peripheral wall. Are substantially the same, and the groove outer peripheral wall upper edge 226 does not interfere with the light distribution of the light emitted from the LED 251.

In the present embodiment, the engagement recess 222 is formed once along the groove outer peripheral wall 221 of the attachment groove 220. Thereby, when the worker wears the glove 100 on the metal casing 200, the glove 100 can be put on the metal casing 200 without being aware of the mounting position, so that workability can be improved.
However, the engagement recess 222 may not be one round on the outer peripheral wall. For example, it may be formed at a position corresponding to the engaging convex portion 130. Moreover, you may form the engagement convex part 130 1 round along the cylinder part outer peripheral surface 121 instead of a flat plate piece.

Embodiment 2. FIG.
In the present embodiment, differences from the first embodiment will be mainly described.
In the present embodiment, the same components as those described in the first embodiment are denoted by the same reference numerals, and the description thereof may be omitted.

FIG. 10 is a perspective view of globe 100a according to the present embodiment. FIG. 11 is a bottom view of globe 100a according to the present embodiment.
The globe 100a shown in FIGS. 10 and 11 is different from the first embodiment in that the notch 150 forms a notch 150a in the outer peripheral edge 145 (an example of the edge) of the outer peripheral tip 141 of the fixing part 140. It is a point which has.

As shown in FIG. 11, the notch 150 has a semicircular notch in the outer peripheral edge 145.
In the shape of the notch 150a, the circumferential width is L20 and the depth is L21. At this time, the circumferential width L20 is preferably the same as or slightly narrower than the circumferential width L11 of the engaging protrusion 130. Further, the depth L21 is not more than the depth L2 of the fixing portion and is preferably not less than L2 / 2 (see FIG. 12).
The shape of the notch 150a does not have to be semicircular, but may be triangular, polygonal, daruma, or the like.

The notch 150 is provided so that the two notches 150 are located at both ends of the diameter of the annular outer peripheral edge 145. As shown in FIG. 11, when the center of the annular outer peripheral edge 145 is O, notches 150 are formed at both ends of each of the four diameters D1 to D4 drawn so as to have a uniform central angle. Is done. Thus, the fixing | fixed part 140 is provided with the eight notch parts 150 provided at equal intervals.
Note that the notch 150 does not necessarily have to be provided at both ends of the diameter of the outer peripheral edge 145. For example, when odd-numbered notch portions 150 such as three, five, seven, nine, etc. are provided, they may be provided on the outer peripheral edge portion 145 at equal intervals.

  Further, in the present embodiment, the notch portions 150 having the same shape are provided in the outer peripheral edge portion 145 at equal intervals, but the notches having the same shape may be omitted. Each of the plurality of notches may have a non-uniform shape. Further, the intervals may not be uniform but may be non-uniform. Further, the outer peripheral edge portion 145 is not necessarily cut out, and may be a hole penetrating the fixing portion 140 between the cylindrical outer peripheral surface 121 and the outer peripheral tip 141 in the vertical direction, for example.

  As shown in FIG. 11, four of the eight notch portions 150 are formed at positions corresponding to the engaging convex portions 130. That is, the four notches 150 are provided at positions overlapping the engaging protrusions 130, and the notches 150 and the engaging protrusions 130 are adjacent in the vertical direction.

FIG. 12 is a partially enlarged cross-sectional view for explaining the mounting structure of the mounting tube portion 120 and the mounting groove 220 according to the present embodiment. FIG. 13 is a partially enlarged cross-sectional view showing a mounting structure between the mounting tube portion 120 and the mounting groove 220 according to the present embodiment. FIG. 14 is a schematic diagram showing a CC cross section of FIG. 13.
The attachment cylinder part 120 shown in FIG. 12 is a figure corresponding to the DD cross section of the attachment cylinder part 120 shown in FIG.

As shown in FIG. 12, the adhesive member 260 is dropped on the groove bottom 223 in advance. In the present embodiment, more adhesive members 260 are dropped than in the case of the first embodiment.
In this state, the mounting cylinder portion 120 of the globe 100a is inserted into the mounting groove 220, and the engaging convex portion 130 and the engaging concave portion 222 are engaged, and the fixing portion 140 is fixed near the groove bottom portion 223.

As shown in FIGS. 13 and 14, the adhesive member 260 pushed out by the fixing portion 140 passes through the notch 150a and moves upward. Then, the adhesive member 260 reaches the engagement position between the engagement convex portion 130 and the engagement concave portion 222.
The amount of the adhesive member 260 dropped on the groove bottom 223 in advance fills the notch 150a and fills the upper portion 1451 of the fixing portion 140, and further reaches the engagement position between the engagement convex portion 130 and the engagement concave portion 222. The amount to reach.

  As described above, according to the cover attachment mechanism 510 according to the present embodiment, the glove 100a has the cutout portion 150 in the outer peripheral edge portion 145 of the fixing portion 140, and thus the adhesive member 260 is cut out. Is passed from below to above and reaches the engagement position between the engagement protrusion 130 and the engagement recess 222. Thereby, the engaging part of the engaging convex part 130 and the engaging concave part 222 also functions as a joint part by the adhesive member 260, and the adhesive strength can be further increased.

Further, also in the notch 150 (see FIG. 11) at a position not corresponding to the engaging protrusion 130, the adhesive member 260 passes through the notch 150 from below to reach the upper part 1451 of the fixing part 140. Therefore, the adhesive member 260 can be spread over a wide range in the vicinity of the fixing portion 140. Thereby, the groove outer peripheral wall 221 of the attachment groove 220 and the cylinder outer peripheral surface 121 of the attachment cylinder part 120 are bonded via the adhesive member 260, and the connection between the attachment cylinder part 120 and the attachment groove 220 becomes stronger.
Therefore, even if the cover attachment mechanism does not have an engagement mechanism between the engagement convex portion 130 and the engagement concave portion 222, the attachment cylinder portion can be obtained by providing the notch portion 150 in the fixing portion 140. The adhesive force between 120 and the mounting groove 220 can be further increased.

  In addition, since the notches 150 are provided at both ends of the diameter of the outer peripheral edge 145, the strength of joining between the mounting cylinder 120 and the mounting groove 220 is set to the circumference of the mounting cylinder 120 and the mounting groove 220. Can be even across. Thereby, even when the years of use have elapsed in the lighting device 500 and the adhesive member 260 starts to deteriorate, it is possible to obtain a stable lighting device 500 in which rattling or the like hardly occurs.

Embodiment 3 FIG.
In the present embodiment, differences from the first embodiment will be mainly described.
In this embodiment, the same components as those described in Embodiment 1 are denoted by the same reference numerals, and the description thereof may be omitted.

15A and 15B are diagrams showing variations of the mounting structure of the mounting cylinder portion 120 and the mounting groove 220 according to the present embodiment, where FIG. 15A is a variation A and FIG.
First, the mounting structure of the variation A shown in FIG.
As shown in FIG. 15A, the engaging convex portion 130 has a shape protruding inward from the cylindrical inner peripheral surface 122 (an example of the peripheral surface) of the mounting cylindrical portion 120.
In addition, the fixed portion 140 has a shape in which a portion thicker than the thickness of the mounting tube portion 120 protrudes inward from the tube portion inner peripheral surface 122. An inner peripheral edge portion of the fixing portion 140 is referred to as an inner peripheral edge portion 146.
Further, the engagement recess 222 that engages with the engagement protrusion 130 is formed in the groove inner peripheral wall 224 (an example of the peripheral wall) of the attachment groove 220.

  In the mounting structure of variation A shown in FIG. 15A, the engaging mechanism including the engaging convex portion 130, the fixing portion 140, and the engaging concave portion 222 is provided on the inner peripheral side of the mounting cylindrical portion 120 and the mounting groove 220. Although provided points differ from the first embodiment, the function of each component is the same as that described in the first embodiment.

  In the mounting structure of variation A shown in FIG. 15A, the groove inner peripheral wall upper edge 225 and the groove outer peripheral wall upper edge 226 have a height difference of L5, so that the groove inner peripheral wall upper edge from the groove bottom 223. The distance to 225 is shorter than from the groove bottom 223 to the groove outer peripheral wall upper edge 226. Therefore, the case where the engagement recess 222 is formed near the groove outer peripheral wall upper edge 225 is closer to the engagement recess 222 than the case where the engagement recess 222 is formed near the groove outer peripheral wall upper edge 225. The distance becomes shorter. Therefore, in the mounting structure of variation A, by adjusting the amount of the adhesive member 260, the adhesive member 260 pushed out by the fixing portion 140 is made to reach the engaging portion between the engaging convex portion 130 and the engaging concave portion 222. Becomes easy. That is, the adhesive member 260 can reach the engagement portion with a simple configuration.

Next, the attachment structure of the variation B shown in FIG.15 (b) is demonstrated.
As shown in FIG. 15 (b), the engaging convex portion 130 has a shape protruding outward from the cylindrical portion outer peripheral surface 121 of the mounting cylindrical portion 120, as in the first embodiment.
The fixed part 140 has a shape in which a portion thicker than the thickness of the mounting cylinder part 120 protrudes to both the outside and the inside.
The engaging recess 222 is formed in the groove outer peripheral wall 221 of the mounting groove 220 as in the first embodiment.

  The mounting structure of variation B shown in FIG. 15B is different from the first embodiment in that the fixing portion 140 protrudes to both the outer side and the inner side, but the function of each component is the same as in the first embodiment. The same as described.

  According to the mounting structure of variation B shown in FIG. 15B, the adhesive member 260 pushed out by the fixing portion 140 at the groove bottom 223 is adjusted by adjusting the amount of the adhesive member 260. 145 reaches the upper part 1451 and reaches the upper part 1461 of the inner peripheral edge 146 of the fixing part 140. Therefore, the periphery of the fixing portion 140 can be surrounded by the adhesive member 260, and an attachment structure that is less likely to come off can be obtained.

Embodiment 4 FIG.
In the present embodiment, differences from Embodiments 2 and 3 will be mainly described.
In the present embodiment, the same components as those described in the second and third embodiments are denoted by the same reference numerals, and the description thereof may be omitted.

In the present embodiment, the case where the notch 150 described in the second embodiment is provided in the variations A and B of the mounting structure described in the third embodiment will be described.
FIG. 16 is a diagram showing a mounting structure between the mounting cylinder portion 120 and the mounting groove 220 according to the present embodiment, and is a diagram showing a case where the notch portion 150 is provided in FIGS. 15 (a) and 15 (b). .
As shown in FIG. 16A, a notch 150 may be provided on the inner peripheral edge 146 of the fixed part 140.
Further, as shown in FIG. 16B, a notch 150 may be provided on both the inner peripheral edge 146 and the outer peripheral edge 145 of the fixing part 140. Or you may provide the notch 150 in any one of the inner peripheral part 146 and the outer peripheral part 145 of the fixing | fixed part 140. FIG.

  The point that the notch 150 is provided in the inner peripheral edge 146 or the point that the notch 150 is provided on both sides of the inner peripheral edge 146 and the outer peripheral edge 145 has been described in the second embodiment. Although different from the above, the functional configuration of the notch 150 is the same as that described in the second embodiment.

  As shown in FIGS. 16 (a) and 16 (b), it is possible to make the mounting structure more difficult to come off by providing a notch 150 with respect to the mounting structure variations of FIGS. 15 (a) and 15 (b).

Further, as shown by a dotted line in FIG. 16B, an engagement protrusion 1301 may be provided also on the cylindrical portion inner peripheral surface 122 side. In this case, an engagement recess 2221 is provided on the groove inner peripheral wall 224 of the mounting groove 220 as indicated by a dotted line.
For example, the engagement protrusion 1301 is a protrusion having a spherical surface. The engagement recess portion 2221 forms a recess at a position corresponding to the engagement protrusion 1301 of the groove inner peripheral wall 224. Thereby, it can prevent that the attachment cylinder part 120 rotates within the attachment groove | channel 220, for example.

  In the above description of the first to fourth embodiments, the ratios of the width, depth, thickness, length, height, height difference, etc. of each component have been described using specific numerical values, but these numerical values are examples. And various modifications can be made as necessary. The most preferable numerical value in the above description is the most preferable numerical value from the viewpoints of the function of the component (for example, the bending function of the engaging protrusion 130), the ease of manufacturing the component, the manufacturing cost, and the like. .

  Moreover, although Embodiment 1-4 was demonstrated, you may implement combining 2 or more among these embodiments. Alternatively, one of these embodiments may be partially implemented. Alternatively, two or more of these embodiments may be partially combined. In addition, this invention is not limited to these embodiment, A various change is possible as needed.

  DESCRIPTION OF SYMBOLS 100 Globe, 110 Light transmissive part, 120 Mounting cylinder part, 121 Cylindrical outer peripheral surface, 122 Cylindrical inner peripheral surface, 130 Engaging convex part, 131 Convex tip, 140 Fixed part, 141 Outer peripheral tip, 142 Fixed part bottom face Outer end surface, 144 Inner surface, 145 Outer peripheral edge portion, 146 Inner peripheral edge portion, 150 Notch portion, 150a Notch portion, 160 Tube portion outer peripheral surface, 200 Metal housing, 210 Light source mounting portion, 211 Electric wire insertion hole, 212 Screw hole, 213 Light source mounting surface, 220 mounting groove, 220a cover mounting portion, 221 groove outer peripheral wall, 222 engaging recess, 223 groove bottom, 224 groove inner peripheral wall, 225 groove inner peripheral wall upper edge, 226 groove outer peripheral wall upper edge Part, 227 cavity, 229 cavity, 230 fin, 250 LED board, 251 LED, 252 board hole, 253 board screw hole, 26 Adhesive member 300 resin casing, 400 mouthpiece, 500 illumination device, 510 cover mounting mechanism, 1301 engaging projections, 1311 cylindrical portion side tapered portion, 1451,1461 upper, 2221 engaging recess, 2261 groove side tapered portion.

Claims (5)

A mounting portion having a cover mounting portion formed with a groove portion in which a dropped adhesive member is movable, which is an annular groove portion having a bottom portion;
A cover attached to the cover mounting portion, wherein the cylindrical mounting cylinder portion which is inserted into the groove, provided in an end portion of the mounting cylinder portion, thicker than the thickness of the mounting cylinder portion, the bottom portion and a cover having a fixed solid tough,
The fixed portion includes a cutout portion that forms a cutout at least at an outer peripheral edge or an inner peripheral edge,
The notch is in a state where the mounting cylinder part is inserted into the groove, cover attachment mechanism that is passed through the adhesive member. The notch, the cover mounting mechanism according to the edges 請 Motomeko 1 that he lack cut in a semicircular shape. The groove has an outer peripheral wall,
The cover mounting portion has a recess formed in the outer peripheral wall,
The cover has a convex portion protruding from the outer peripheral surface of the mounting cylinder portion and engaging with the concave portion,
The fixing portion cover mounting mechanism according to 請 Motomeko 1 or 2 with the notch at a position corresponding to the convex portion. The notch, the cover mounting mechanism according to any one of 請 Motomeko 1 provided at both ends of the diameter of the edge portion of the annular 3. A cover mounting mechanism according to any one of claims 1 to 4,
The attachment portion is further lighting apparatus having a light source attachment portion for attaching the light source.

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