Movable attachment structure and lighting device

Abstract

To provide a movable mounting structure capable of moving two members while holding them.SOLUTION: The movable attaching structure 40 includes a screw 41, a first member 42, a second member 43, and a friction member 44. The screw 41 has a head portion 46, a screw portion 47, and a shaft portion 48 having a larger diameter than the screw portion 47 between the head portion 46 and the screw portion 47. The first member 42 has a screw insertion part 51 through which the screw part 47 and the shaft part 48 of the screw 41 are inserted and which is movable in a predetermined movable direction c in the inserted state. The screw portion 47 of the screw 41 inserted through the screw insertion portion 51 is screwed into the second member 43, and the second member 43 is attached to the first member 42 so as to be movable in the movable direction c together with the screw 41. The friction member 44 is sandwiched between the head 46 of the screw 41 and the first member 42, generates a frictional force that holds the screw 41 on the first member 42, and moves relative to the first member 42 when a force exceeding the frictional force is applied in the movable direction c via the screw 41.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] SUMMARY OF THE INVENTION Embodiments of the present invention relate to a movable mounting structure and a lighting device. [Background technology]

[0002] Conventionally, when two movable components are attached with screws, the movement positions of the two components are adjusted and then the screws are tightened to secure the two components in place. In this case, if a force is applied to one of the components in the direction of movement, the force cannot be released or absorbed, which can lead to deformation or damage to the components or parts attached to the components. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-235398 Summary of the Invention [Problem to be solved by the invention]

[0004] The problem to be solved by the present invention is to provide a movable mounting structure and a lighting device that can move while holding two members. [Means for solving the problem]

[0005] The movable mounting structure of one embodiment includes a screw, a first member, a second member, and a friction member. The screw has a head, a threaded portion, and a shank portion between the head and the threaded portion that is larger in diameter than the threaded portion. The first member has a screw insertion portion into which the threaded portion and shank of the screw are inserted and which allows the second member to move in a predetermined movable direction while inserted. The second member is threadedly engaged with the threaded portion of the screw that is inserted through the screw insertion portion, and is attached to the first member so as to be movable together with the screw in the movable direction. The friction member is sandwiched between the head of the screw and the first member, and generates a friction force that holds the screw to the first member, and moves relative to the first member when a force exceeding the friction force is applied via the screw in the movable direction. [Effects of the Invention]

[0006] According to the movable mounting structure of the embodiment, the two members can be moved while being held. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a perspective view of an illumination device showing an embodiment. [Figure 2] FIG. [Figure 3] 1A and 1B show plan views of protrusions arranged on the fixture body of the same lighting device, where (a) is a plan view showing one example, (b) is a plan view showing another example, and (c) is a plan view showing yet another example. [Figure 4] FIG. 2 is a perspective view of a movable mounting structure of the lighting device. [Figure 5] FIG. 3 is a cross-sectional view of the movable mounting structure of the lighting device. [Figure 6] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0008] An embodiment will be described below with reference to the drawings.

[0009] 1 and 2, lighting device 10 is a long, moisture-proof and rain-proof lighting device that is installed on an installation surface such as a ceiling or wall. Lighting device 10 comprises a fixture body 11, a light source 12 attached to fixture body 11, and a cover (translucent cover) 13 attached to fixture body 11 to cover light source 12. In lighting device 10, light source 12 itself has a moisture-proof and rain-proof structure, and by using light source 12, no moisture-proof and rain-proof structure is required between fixture body 11 and cover 13, etc.

[0010] The fixture body 11 is formed long and made of, for example, a metal plate. The fixture body 11 has a rectangular, flat mounting plate portion 20 and side edge portions 21 bent from both sides in a short direction b, which is a second direction intersecting a longitudinal direction a, which is a first direction, of the mounting plate portion 20. A back surface 20a, which is the outer surface of the mounting plate portion 20, is a fixture mounting surface to be mounted on an installation surface, and a front surface 20b (see FIG. 5), which is the inner surface, is a light source mounting surface to which the light source 12 is attached.

[0011] A wiring hole 22 is provided in the center of the mounting plate 20 in the longitudinal direction a, through which a power line drawn from the installation surface can be inserted. A plurality of mounting holes 23 for mounting to the installation surface are provided near both ends of the mounting plate 20 in the longitudinal direction a. The mounting holes 23 are for mounting to a pair of suspension bolts protruding from the installation surface, and a pair of mounting holes 23 with a narrow pitch and a pair of mounting holes 23 with a wide pitch are provided to correspond to the two types of pitch of the pair of suspension bolts.

[0012] As shown in Figures 1 to 4 (see Figure 3 (a)), the mounting plate portion 20 has multiple protrusions 24 protruding from the back surface 20a side, and openings 25 that open into the mounting plate portion 20 are provided adjacent to each protrusion 24.

[0013] The protrusions 24 are provided near each mounting hole 23, at two locations near both sides of each mounting hole 23 in the short direction b, and at two locations in the short direction b near both ends of the mounting plate portion 20 in the longitudinal direction a.

[0014] Each protrusion 24 is formed in a bridge structure that protrudes in an arc shape with both ends connected to the mounting plate 20. The protrusion 24 is provided by bending from the tip side of the communication portion 26 that protrudes from the mounting plate 20 into the opening 25. If the direction connecting the both ends connected to the mounting plate 20 is called the bridge direction, the protrusion 24 is provided so that the orientation of this bridge direction is parallel to the longitudinal direction a of the mounting plate 20. Note that the bridge shape of the protrusion 24 is not limited to an arc shape and may be, for example, a trapezoidal or triangular shape. The protrusion 24 protrudes from the mounting plate 20 by a height of 5 mm or more.

[0015] The openings 25 are opened adjacent to both sides of the protruding portion 24 in a direction intersecting the bridge direction, and are opened on both sides of the protruding portion 24 and the connecting portion 26 in the short direction b. The openings 25 are wider than the length of the protruding portion 24 along the bridge direction by the length of the connecting portions 26 at both ends. The width of the openings 25 in the direction intersecting the bridge direction of the protruding portion 24 (width in the short direction b) is narrower than the width of the protruding portion 24.

[0016] When the fixture body 11 is processed using a mold, the opening 25 is punched at the same time as the wiring hole 22 and the mounting hole 23 are punched, and the protrusion 24 is pressed and the side edge 21 is bent in the same process as the punching, so that the fixture body 11 is processed in a single process.

[0017] The orientation of the protrusions 24 in the bridge direction may be along the short-side direction b of the mounting plate 20, as shown in FIG. 3(b), or may be on a substantially diagonal line inclined at approximately 45° with respect to the longitudinal direction a and the short-side direction b of the mounting plate 20, as shown in FIG. 3(c). In the cases of FIGS. 3(a) and 3(b), the processing of the protrusions 24 is easy, and in the case of FIG. 3(a), it is possible to perform roll forming. In all of the cases of FIGS. 3(a) to 3(c), the provision of the protrusions 24 can suppress deformation of the mounting plate 20 when it is installed on the installation surface, but in the case of FIG. 3(c), the effect of suppressing deformation of the mounting plate 20 in the long-side direction a and the short-side direction b can be enhanced.

[0018] A metal light source mounting base 30, to which both ends of the light source 12 are attached, is fixed on the front surface 20b side of the mounting plate 20 near both ends of the fixture body 11 in the longitudinal direction a. The light source mounting base 30 has a fixing portion 32 fixed to the mounting plate 20 with screws 31, a light source mounting portion 33 to which the light source 12 is attached, and a body portion 34 between the fixing portion 32 and the light source mounting portion 33. The fixing portion 32 has a guide groove 35 that opens toward the end of the mounting base 20 and is provided along the longitudinal direction a (movable direction c) of the mounting plate 20.

[0019] As shown in FIGS. 4 and 5, movable mounting structures 40 for mounting both ends of the cover 13 to the appliance body 11 are provided on both ends of the mounting plate portion 20 in the longitudinal direction a.

[0020] The movable mounting structure 40 includes a screw 41, a first member 42, a second member 43, and a friction member 44.

[0021] 6, the screw 41 is made of metal and includes a head 46 having a recess for inserting a tool, a threaded portion 47 on which a screw thread is formed, a shank 48 which is an incompletely threaded portion between the head 46 and the threaded portion 47 and has a diameter larger than the outer diameter of the thread of the threaded portion 47, and a plurality of protrusions 49 protruding from the bearing surface of the head 46. The protrusions 49 are, for example, conical in shape and protrude from positions equally spaced apart in the circumferential direction of the bearing surface of the head 46.

[0022] The first member 42 is a fixed member and is composed of the instrument body 11 (hereinafter, the first member 42 will be referred to as the instrument body 11 or the mounting plate 20). The instrument body 11 has a screw insertion portion 51 into which the threaded portion 47 and shank 48 of the screw 41 are inserted and which allows the shank 48 to move in a predetermined movable direction c (parallel to the longitudinal direction a) with the shank 48 inserted. The screw insertion portion 51 is provided at both ends of the longitudinal direction a of the mounting plate 20. The screw insertion portion 51 is an elongated hole 52 that is long along the movable direction c, which is the longitudinal direction a of the instrument body 11. The width of the elongated hole 52 in the lateral direction b is wider than the diameter of the threaded portion 47 and shank 48 of the screw 41 and narrower than the diameter of the head 46. The screw insertion portion 51 may also be a long groove or the like that is long along the longitudinal direction a of the instrument body 11.

[0023] The second member 43 is a movable member attached to the device body 11 so as to be movable in the movable direction c. The second member 43 is made of a metal plate and includes a movable attachment part 54 which is a first attachment part attached to the device body 11, a cover attachment part 55 which is a second attachment part bent from the movable attachment part 54, and bent parts 56 which are bent from both sides of the cover attachment part 55 to areas which overlap with the movable attachment part 54.

[0024] The movable mounting portion 54 of the second member 43 is provided with a screw hole 57 into which the threaded portion 47 of the screw 41 screws. The movable mounting portion 54 is attached by the screw 41 while being disposed on the front surface 20b side of the mounting plate portion 20, and the screw 41 and the second member 43 are movable together in the movable direction c.

[0025] A slide portion 58 protrudes from the movable mounting portion 54 of the second member 43 on an edge portion facing the light source mount base 30. The slide portion 58 engages with the guide groove 35 of the light source mount base 30 to guide movement of the second member 43 in the movable direction c. A pair of stopper portions 59 protrude from both sides of the slide portion 58 and can abut against the light source mount base 30. The slide portion 58 maintains engagement with the guide groove 35 even when the second member 43 moves to a position where the shank 48 of the screw 41 contacts the outer end of the elongated hole 52 in the longitudinal direction a. The stopper portions 59 restrict movement of the second member 43 toward the center of the mounting plate 20 when the second member 43 abuts against the light source mount base 30. When the stopper portions 59 restrict movement of the second member 43, the shank 48 of the screw 41 is in a position away from the inner end of the elongated hole 52 in the longitudinal direction a. When the lighting device 10 is shipped from the factory, the initial state is a state in which the stopper portion 59 of the second member 43 abuts against the light source mounting base 30 and is held by the screw 41, that is, a state in which the second member 43 has moved the furthest toward the center of the fixture body 11 in the movable direction c and is held by the screw 41.

[0026] In addition, the light source mounting base 30, which has a guide groove 35 with which the slide portion 58 of the second member 43 engages to guide the movement of the second member 43 in the movable direction c, constitutes part of the movable mounting structure 40 as a third member attached to the first mounting member 42.

[0027] The cover mounting portion 55 of the second member 43 is formed with a screw hole 60 for mounting the cover.

[0028] The friction member 44 is made of a rubber washer, a silicone washer, or the like, which has elasticity and a higher coefficient of friction than metal. The friction member 44 is ring-shaped with a central hole, and the threaded portion 47 and shank 48 of the screw 41 are inserted into the central hole, and the friction member 44 is fitted around the shank 48. The friction member 44 has an outer diameter larger than the width in the short direction b of the elongated hole 52, which is the screw insertion portion 51, and is sandwiched between the head 46 of the screw 41 and the mounting plate portion 20. The friction member 44 has a smaller diameter than the outer diameter of the head 46 of the screw 41 and is equal to or slightly smaller than the diameter of the circumference from which the multiple protrusions 49 of the screw 41 protrude. The friction member 44 engages with the multiple protrusions 49 and is held between the multiple protrusions 49.

[0029] The friction member 44 is sandwiched between the head 46 of the screw 41 and the mounting plate portion 20 and elastically collapses, generating a predetermined friction force that holds the screw 41 and the second member 43 against the mounting plate portion 20, and a force exceeding the friction force is applied in the movable direction c via the second member 43 and the screw 41, causing the friction member 44 to slide against the mounting plate portion 20.

[0030] Here, as an example of the dimensional relationship of the movable mounting structure 40, the axial length of the shank 48 of the screw 41 is 1.70 mm, the thickness of the friction member 44 is 1.00 mm, and the plate thickness of the mounting plate 20 is 0.84 mm. The axial length of the shank 48 of the screw 41 is greater than the plate thickness of the mounting plate 20 and less than the sum of the thickness of the friction member 44 and the plate thickness of the mounting plate 20. Furthermore, the difference obtained by subtracting the protruding height of the projection 49 from the axial length of the shank 48 of the screw 41 is greater than the plate thickness of the mounting plate 20 and less than the sum of the thickness of the friction member 44 and the plate thickness of the mounting plate 20. The crushing ratio (volume) of the friction member 44 between the mounting plate 20 and the head 46 of the screw 41 is preferably 14.5% and at least 0.2% to obtain a predetermined frictional force. The crushing rate of the friction member 44 is achieved by controlling the axial length of the shank 48, which is the incomplete thread portion of the screw 41.

[0031] As shown in FIG. 2 , the light source 12 is elongated and has a moisture-proof and rain-proof structure. The light source 12 includes a cylindrical envelope 70 that is optically transparent at least in the light irradiation direction, and houses a light source module (not shown) having a plurality of light-emitting elements such as LEDs, and a power supply unit that converts external power input from the outside into a predetermined lighting power and supplies it to the plurality of light-emitting elements. Both ends of the envelope 70 are sealed with caps 71. The caps 71 on both ends of the light source 12 are placed on the light source mounting portions 33 of the light source mount bases 30 on both ends of the fixture body 11, and the light source 12 is attached to the fixture body 11 by threading the screws incorporated in the caps 71 into the threaded holes provided in the light source mounting portions 33. A power input line, one end of which is connected to the power supply unit of the light source 12, is drawn out from one of the caps 71 through a packing, and the other end of this power input line is connected to a power line drawn into the fixture body 11.

[0032] The cover 13 is formed into a long length from a milky white translucent resin material such as acrylic resin. The cover 13 houses and covers the front side of the fixture body 11 placed on the installation surface and the light source 12 attached to the front side of the fixture body 11, and both ends of the cover 13 in the longitudinal direction a are detachably attached to the fixture body 11 with decorative screws 80 that are attachment screws.

[0033] The cover 13 is box-shaped and has a front portion 81, side portions 82 on both sides of the front portion 81 in the short direction b, and end face portions 83 on both ends of the front portion 81 in the long direction a, and is open on the back side.

[0034] The end face portions 83 at both ends are formed substantially perpendicular to the front face portion 81. The end face portions 83 at both ends are formed with insertion holes 84 through which decorative screws 80 are inserted for attaching the cover 13 to the appliance body 11. The end face portions 83 at both ends are formed with drainage holes 85 near the front face portion 81 side for draining rainwater and the like that has entered the cover 13 to the outside.

[0035] A mounting bracket 87 is attached to the cover 13 for mounting to the appliance body 11 with decorative screws 80. The mounting bracket 87 has an outer plate portion 88 arranged on the outer surface side of the end surface portion 83, and a pair of protrusions 89 bent from both ends of the outer plate portion 88 in the width direction (short side direction b) toward the inner surface side of the outer plate portion 88, and is attached by engaging the pair of protrusions 89 with the upper edge of the end surface portion 83. The outer plate portion 88 is provided with a mounting hole 90 that faces the insertion hole 84 when attached to the cover 13.

[0036] Next, when installing the lighting device 10 on an installation surface, first, with the light source 12 and cover 13 removed from the fixture body 11, the power supply wire drawn out from the installation surface is pulled into the fixture body 11 through the wiring hole 22 of the fixture body 11, and the back surface 20a side of the fixture body 11 is placed and fixed on the installation surface. At this time, a pair of hanging bolts protruding from the installation surface are passed through a pair of mounting holes 23 of the fixture body 11, and nuts are screwed onto and tightened onto the hanging bolts inserted through the fixture body 11, so that the fixture body 11 is installed on the installation surface with the multiple protrusions 24 protruding from the back surface 20a of the fixture body 11 in contact with the installation surface.

[0037] Both ends of the light source 12 are fixed to the light source mount 30 of the fixture body 11, and the power line drawn into the fixture body 11 is connected to the light source 12.

[0038] The cover 13 with the mounting bracket 87 attached is placed over the fixture body 11, and the decorative screw 80 is threaded into the screw hole 60 of the second member 43 through the mounting hole 90 of the mounting bracket 87 and the insertion hole 84 of the cover 13, thereby attaching the cover 13 to the fixture body 11.

[0039] When the cover 13 is placed on the fixture body 11, the second member 43 moves the furthest toward the center of the fixture body 11 in the movable direction c and is in an initial state held by the screw 41, so that the distance between the inner surfaces of the end face portions 83 of the cover 13 is sufficiently wider than the distance between the outer surfaces of the second member 43 at both ends of the fixture body 11, making it easier to place the cover 13 on the fixture body 11.

[0040] When the decorative screw 80 that threads into the second member 43 is tightly tightened, the force applied to the second member 43 outward in the movable direction c exceeds the frictional force of the friction member 44 against the mounting plate portion 20, and the screw 41, friction member 44, and second member 43 may move together outward in the movable direction c. When the friction member 44 and second member 43 move together to the maximum extent outward in the movable direction c, the second member 43 comes into contact with the end surface portion 83 of the cover 13 and stops. In this state, the screw 41 is located midway in the movable direction c of the elongated hole 52, and is able to move in both directions in the movable direction c.

[0041] Since the slide portion 58 of the second member 43 is engaged with the guide groove 35 of the light source mounting base 30, the second member 43 is prevented from rotating around the screw 41 or rattling relative to the fixture body 11, and the movement of the second member 43 in the movable direction c is guided.

[0042] When power is supplied to the lighting device 10 through a power line, the light source 12 lights up, and light that has passed through the cover 13 is irradiated onto the surrounding area.

[0043] Furthermore, the lighting device 10 may expand or contract in response to temperature changes at the installation location. The cover 13 made of acrylic resin or the like has a larger coefficient of linear expansion than the metal fixture body 11, and the dimension in the longitudinal direction a changes more significantly with temperature changes.

[0044] When the cover 13 extends in the longitudinal direction a due to a rise in temperature, a force is applied to the second member 43 in the outward direction of the movable direction c (outward from the end of the device body 11) in response to the displacement of the cover 13, and when this force exceeds the friction force of the friction member 44 against the mounting plate portion 20, the screw 41, the friction member 44 and the second member 43 move together in the outward direction of the movable direction c.

[0045] On the other hand, when the cover 13 shrinks in the longitudinal direction a due to a drop in temperature, a force is applied to the second member 43 in the inward direction of the movable direction c (toward the center of the device body 11) in response to the displacement of the cover 13, and when this force exceeds the friction force of the friction member 44 against the mounting plate portion 20, the screw 41, the friction member 44 and the second member 43 move together inward in the movable direction c.

[0046] Furthermore, in the lighting device 10 of this embodiment, openings 25 are provided adjacent to both sides of the protrusion 24 that protrudes from the mounting plate portion 20. Therefore, even when a protrusion 24 that protrudes a large height from the mounting plate portion 20 is provided, the mounting plate portion 20 is less susceptible to deformation or damage, and the protrusion 24 can be provided by a single press process, improving processability.

[0047] When forming the fixture body 11, the opening 25 can be punched out at the same time as punching out the wiring holes 22 and mounting holes 23 from the mounting plate 20, and the protrusion 24 can be pressed in the same process as this punching, so that the processing can be carried out in a single process.

[0048] Since the protrusion 24 is provided in the vicinity of the mounting hole 23, deformation of the mounting plate portion 20 in the vicinity of the mounting hole 23 can be suppressed when the fixture body 11 is installed using the mounting hole 23.

[0049] The protrusion 24 is formed in a bridge structure that protrudes with both ends connected to the mounting plate portion 20, and openings 25 are provided on both sides of the protrusion 24, so even if the protrusion height from the mounting plate portion 20 is high, the impact of deformation or damage to the mounting plate portion 20 is small, and processability can be improved.

[0050] A bridge-structured protrusion 24 is provided along the longitudinal direction a of the device body 11, and openings 25 are formed on both sides of this protrusion in the lateral direction b of the mounting plate portion 20, making it possible to accommodate roll forming and improving manufacturability.

[0051] Furthermore, in this embodiment, the friction member 44 is sandwiched between the head 46 of the screw 41 and the mounting plate portion 20 and elastically collapses, thereby generating a predetermined frictional force that holds the screw 41 and the second member 43 against the mounting plate portion 20, and a force that exceeds the frictional force is applied in the movable direction c via the second member 43 and the screw 41, causing the screw 41 and the second member 43 to move relative to the mounting plate portion 20, thereby providing a movable mounting structure 40 that can move while holding the two members 42, 43.

[0052] The screw 41 has a head 46, a threaded portion 47, and a shaft portion 48 between the head 46 and the threaded portion 47 that has a larger diameter than the threaded portion 47. Therefore, the axial length of the shaft portion 48 can be used to set the distance between the first member 42 and the head 46, and the crushing rate of the friction member 44 between the first member 42 and the head 46 and the frictional force of the friction member 44 against the first member 42 that corresponds to this crushing rate can be controlled.

[0053] The friction member 44 is disposed on the shaft portion 48 of the screw 41 , so that the friction member 44 can be sandwiched between the mounting plate portion 20 and the head portion 46 of the screw 41 .

[0054] Since a protrusion 49 that engages with the friction member 44 is provided on the bearing surface of the head 46 of the screw 41, the friction member 44 can be held on the screw 41, and the friction member 44 can slide smoothly against the first member 42.

[0055] By applying the movable mounting structure 40 to the structure for mounting the cover 13 to the fixture body 11 of the lighting device 10, even if the cover 13 expands or contracts due to temperature changes, the load on the cover 13 is reduced and damage to the cover 13 can be prevented.

[0056] Although the lighting device 10 has been described as having a long fixture body 11, the present invention can also be applied to a lighting device 10 having a circular or rectangular fixture body 11.

[0057] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the scope of the invention and its equivalents as defined in the claims. [Explanation of symbols]

[0058] 10. Lighting equipment 11. Instrument body 13 Cover 40 Movable mounting structure 41 Screw 42 First member 43 Second member 44 Friction material 46 Head 47 Threaded section 48 Shaft 49 Protrusion 51 Screw insertion part

Claims

1. a screw having a head, a threaded portion, and a shank portion between the head and the threaded portion and having a larger diameter than the threaded portion; a first member having a screw insertion portion through which the threaded portion and the shank of the screw are inserted and which allows the screw to move in a predetermined movable direction in the inserted state; a second member into which the threaded portion of the screw inserted into the screw insertion portion is threadedly engaged and which is attached to the first member so as to be movable together with the screw in the movable direction; a friction member that is sandwiched between the head of the screw and the first member, generates a friction force that holds the screw to the first member, and moves relative to the first member when a force that exceeds the friction force is applied via the screw in the moving direction; A movable mounting structure comprising:

2. The friction member is disposed on the shank of the screw.

2. The movable mounting structure according to claim 1.

3. A projection that engages with the friction member is provided on the bearing surface of the head of the screw. The movable structure according to claim 1 .

4. a metal tool body having the movable mounting structure according to any one of claims 1 to 3 and on which the first member is provided; a resin cover attached to the second member and covering the instrument body; A lighting device comprising:

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