JP4337769B2 - lighting equipment - Google Patents

Description

  The present invention relates to a table lamp having a parallel link arm that includes an upper arm and a lower arm, and ends of the upper arm and the lower arm are supported by an arm support.

2. Description of the Related Art Conventionally, there is known a desk lamp having a parallel link arm that includes an upper arm and a lower arm, and ends of the upper arm and the lower arm are supported by an arm support. This is because the lamp and the base are connected by a parallel link arm so that the position of the lamp can be moved. In order to prevent excessive movement of the parallel link arm when the lamp is moved, Japanese Patent Publication No. 07-118213 (patent) As described in the literature 1), a lock metal fitting was provided.
Japanese Patent Publication No. 07-118213

  However, in the above configuration, since the lock fitting is provided outside the parallel link arm, there is a problem that it is not preferable in appearance. Therefore, as shown in FIGS. 5 and 6, a part of the arm support base 5 of the parallel link arm that has been bent is used as the conventional over-moving prevention stoppers 91 and 92. It is necessary to provide conventional over-moving prevention stoppers 91 and 92 in each of two directions, the upper direction and the lower direction, which increase the outer shape of the support base 5 and is restricted by design. In order to secure the strength of the over-moving prevention stoppers 91 and 92, there is a possibility that the bent portion becomes large and the cost is increased.

  The present invention has been made in view of the above-described background art, and its problem is to provide a table lamp provided with an over-moving prevention stopper that has few design restrictions, has a simple part shape, and reduces costs. That is.

  In order to solve the above-mentioned problems, the present invention is a table lamp having a parallel link arm which is provided with an upper arm and a lower arm, and ends of the upper arm and the lower arm are supported by an arm support, and is overmovable. The table lamp is characterized in that the prevention stopper is provided between the upper arm and the lower arm and provided on the arm support.

  A sleeve portion is provided on the contact surface between the upper arm or the lower arm and the over-movement preventing stopper.

  According to the present invention, since the over-moving prevention stopper is between the upper arm and the lower arm and is provided on the arm support base, the stopper does not cause a problem in appearance, and the arm support base outer shape is Since it does not become large, design constraints are reduced.

  In addition, since one over-moving prevention stopper can regulate the movable range in two directions, the upward direction and the downward direction, the shape of the part is simplified.

  Further, since a reinforcing sleeve portion is provided on the contact surface between the upper arm or the lower arm and the over-moving prevention stopper, deformation of the arm support base is suppressed, and it is not necessary to increase its thickness, thereby reducing costs. be able to.

  An embodiment of a desk lamp 1 corresponding to claims 1 and 2 of the present application will be described with reference to FIGS.

  As shown in FIGS. 1 to 4, the desk lamp 1 according to the present embodiment includes an upper arm 2 and a lower arm 3, and the parallel links in which ends of the upper arm 2 and the lower arm 3 are supported by an arm support 5. A desk lamp 1 having an arm 4, wherein an over-moving prevention stopper 6 is provided between the upper arm 2 and the lower arm 3 and provided on the arm support 5. Here, a sleeve portion 8 is provided on a contact surface 7 between the upper arm 2 or the lower arm 3 and the over-movement preventing stopper 6.

  Hereinafter, the configuration of the table lamp 1 according to the present embodiment will be described in more detail based on FIGS. 1 to 4.

  As shown in FIG. 2, the table lamp 1 supports the lamp body 11, the parallel link arm 4 including the upper arm 2 and the lower arm 3 that support the lamp body 11, and the ends of the upper arm 2 and the lower arm 3. And a base 12 having an arm support 5.

  The lamp body 11 has a substantially semicircular bar shape with an opening on the lower surface, the distal end side is in a semicircular shape in plan view, and the upper surface is formed with a side surface that goes down toward the distal end, and the proximal end side attached to the parallel link arm 4 is The upper surface has a side surface that rises toward the base end, and has a formed housing. The housing is attached to the parallel link arm 4 so as to rotate around the axis and change the irradiation direction. The base 12 is a unit that is a substantially rectangular parallelepiped that houses the discharge lamp lighting circuit and has an operation switch provided below the front surface, and has a thin flat ground plate 13 at the bottom.

  The upper arm 2 is a resin rod, and the lower arm 3 is a resin hollow rod having an outer diameter larger than that of the upper arm 2. In the lower arm 3, an electric wire for connecting a discharge lamp lighting circuit provided on the base 12 and the lamp body is accommodated.

  As shown in FIG. 1, the arm support 5 is formed by bending a thin plate-shaped steel plate into a U-shape, and has side portions 51 and 52 and a back portion 53, and is attached to the base 12. The corners of the side portions 51 and 52 facing the upper arm 2 and the lower arm 3 when chamfered are chamfered. The upper arm 2 and the lower arm 3 are inserted in the vicinity of the chamfered corner portion, and the end portion is rotatably attached to the arm support 5.

  Here, between the upper arm 2 and the lower arm 3, a bar-shaped metal over-motion preventing stopper 6 penetrating the side surfaces 51 and 52 of the arm support 5 is inserted. Further, a metal thin cylindrical sleeve portion 8 is fitted so as to be in contact with the outer periphery of the over-movement preventing stopper 6.

  Next, the operation of the table lamp 1 according to the present embodiment will be described in more detail with reference to FIGS. 3 and 4.

  First, as shown in FIG. 3A, when the lamp body 11 is moved upward and the parallel link arm 4 is rotated from the bottom to the top, the portion facing the upper arm 2 of the lower arm 3 is the sleeve portion 8. Rotating motion stops when it touches. Further, as shown in FIG. 3B, when the lamp 11 is moved upward and the parallel link arm 4 is rotated from above to below, the portion facing the lower arm 3 of the upper arm 2 is the sleeve portion 8. The rotating operation is stopped by contact.

  Here, as shown in FIG. 4A, when the sleeve portion 8 is not used, a concentrated load is loaded on the contact surface 7 between the upper arm 2 and the over-movement preventing stopper 6. Although not shown, the contact surface 7 between the lower arm 3 and the over-movement preventing stopper 6 is the same.

  On the other hand, in the present embodiment, as shown in FIG. 4B, since the sleeve portion 8 is used, a distributed load is loaded on the contact surface 7 between the upper arm 2 and the over-movement preventing stopper 6 rather than the concentrated load. The Rukoto. Although not shown, the contact surface 7 between the lower arm 3 and the over-movement preventing stopper 6 is the same.

  Therefore, according to the above embodiment, the over-movement preventing stopper 6 is provided between the upper arm 2 and the lower arm 3 and provided on the arm support 5, so that the over-movement preventing stopper 6 is a problem in appearance. In addition, since the outer shape of the arm support 5 does not become large, design restrictions are reduced.

  In addition, since one over-moving prevention stopper 6 can restrict the movement in two directions, the upper direction and the lower direction, the part shape is simplified.

  Further, since the reinforcing sleeve portion 8 is provided on the contact surface 7 of the upper arm 2 or the lower arm 3 and the over-moving prevention stopper 3, it is necessary to suppress the deformation of the arm support 5 and increase its thickness. No cost can be suppressed.

The permeation | transmission perspective view of the arm support stand in one Embodiment of this invention. The perspective view of one Embodiment of this invention. The longitudinal cross-sectional view from the side of the arm support stand in one Embodiment of this invention, (a) represents the state which moved to the upper limit of the arm, (b) represents the state which moved to the lower limit of the arm, respectively. The longitudinal cross-sectional view from the front of the arm support base in one embodiment of the present invention, (a) shows a state without a sleeve portion, (b) shows a state with a sleeve portion. The permeation | transmission perspective view of the arm support stand in a prior art example. The longitudinal cross-sectional view from the side of the arm support base in a prior art example, (a) shows the state which moved to the upper limit of the arm, (b) represents the state which moved to the lower limit of the arm, respectively.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Desk lamp 2 Upper arm 3 Lower arm 4 Parallel link arm 5 Arm support base 6 Over-movement prevention stopper 7 Contact surface 8 Sleeve part

Claims (2)

  A desk lamp having a parallel link arm that includes an upper arm and a lower arm, and ends of the upper arm and the lower arm are supported by an arm support, and an over-moving prevention stopper is provided between the upper arm and the lower arm. And a desk lamp provided on the arm support.   The desk lamp according to claim 1, wherein a sleeve portion is provided on a contact surface between the upper arm or the lower arm and the over-movement preventing stopper.

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