JP2013030438A - Insertion part holding structure and projection type video display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insertion part holding structure capable of surely holding an insertion part so as not to be pulled out from a cord insertion part and provide a projection type video display device.SOLUTION: An insertion part holding structure includes a projector body device in which a cord insertion port is provided; and a power source cord 4A in which a plug 41A to be inserted into the cord insertion port is provided, and holds the plug 41A which is inserted into the cord insertion port so as not to be pulled out from the cord insertion port. In the insertion part holding structure, an attachment 5 and the plug 41A are engaged by mounting the attachment 5 on the plug 41A, and a holding fitting 3 and the attachment 5 are engaged by engaging the holding fitting 3 attached to the projector body device with the attachment 5 mounted on the plug 41A which is inserted into the cord insertion port so that the holding fitting 3 restricts the movement of the attachment 5 and the plug 41A in the pull-out direction.

Description

  The present invention relates to an insertion portion holding structure that holds an insertion portion of, for example, a power cord in a state of being inserted into a cord insertion port so as not to be pulled out from the cord insertion port, and a projection type image display including the insertion portion holding structure Relates to the device.

  In general, a projection-type image display device such as a liquid crystal projector includes a projector main body device that is an electronic device provided with a cord insertion port, and a power cord provided with an insertion portion that is inserted into the cord insertion port. The projector body device is supplied with power from the outside of the projector body device via a power cord inserted into the cord insertion port.

  Also, as a structure for holding the plug that is the plug inserted into the cord insertion port so that it is not pulled out of the cord insertion port, a holding bracket that hooks onto the plug of the power cord is used. A known structure is known (see, for example, Patent Document 1).

JP 2011-29129 A (FIGS. 7 and 10)

  By the way, when holding the plug by hooking the holding fitting on the plug of the power cord, it is necessary to use a holding fitting formed to correspond to the shape of the plug. Moreover, not only the power cord, but also the holding bracket formed to correspond to the shape of the cord insertion portion must be used when holding the insertion portion provided in the cord for other uses by the holding bracket. There is. Therefore, in various cords, when the shape of the cord insertion portion is different, the insertion portion of the predetermined cord can be securely held without changing the shape of the holding bracket, but other cords There is a possibility that the insertion portion of the can not be securely held.

  The present invention has been made to solve the above problems, and the object of the present invention is to change the shape of the holding metal fittings without changing the shape of the insertion portion of the cords in various cords. An object of the present invention is to provide an insertion portion holding structure and a projection display apparatus that can hold the insertion portion with certainty.

In the following, means for achieving the above object and its effects are described.
The invention according to claim 1 includes an electrical device provided with a cord insertion port and a cord provided with an insertion portion to be inserted into the cord insertion port, and is inserted into the cord insertion port. In the insertion portion holding structure that holds the insertion portion so that it is not pulled out from the cord insertion port, the direction in which the insertion portion is inserted into the cord insertion port is referred to as the “insertion direction”. An attachment that is detachable with respect to the insertion portion is attached to the insertion portion when the direction in which the insertion portion is pulled out from the cord insertion port is the “extraction direction”. By doing so, the attachment and the insertion portion are engaged, and the holding fitting attached to the electrical device is attached to the insertion portion in a state of being inserted into the cord insertion port. Engagement with the attachment And, by the holding metal fitting and the attachment is engaged, the holding fixture, characterized in that to regulate the movement in the withdrawing direction of the attachment and the insertion portion with respect to the electrical equipment.

  According to the above invention, when the holding fitting is engaged with the attachment, the attachment and the insertion portion of the cord engaged with the attachment are moved in a drawing direction which is a direction of drawing out the insertion portion from the cord insertion port. Is regulated. For this reason, even when the shape of the cord insertion portion is different in various cords, the cord is formed in a shape corresponding to the shape of the insertion portion of the various cords and the shape of the holding metal fitting. By using the attachment, it is possible to securely hold the insertion portion so as not to be pulled out from the cord insertion port without changing the shape of the holding metal fitting.

  According to a second aspect of the present invention, a state in which the holding fitting engages with the attachment and restricts movement of the insertion portion in the pulling direction is referred to as a “holding state”, and the holding fitting engages with the attachment. When the state in which the insertion portion can be moved in the pulling direction without changing to the “holding release state”, the holding bracket can rotate about the predetermined rotation center axis with respect to the electric device. The holding bracket changes from a holding release state to a holding state by rotation of the holding metal fitting, and the holding metal fitting has a locking portion positioned in a pulling direction with respect to the attachment in the holding state, and this locking portion holds The movement of the attachment with respect to the electrical device is locked in a state, and the attachment has a bracket contact surface that contacts the locking portion, and the bracket contact surface rotates the holding bracket. Characterized in that it is a curved along a curved surface.

  According to the above invention, the holding portion of the holding metal fitting that rotates when the holding release state is changed to the holding state is slid on the metal fitting contact surface that is a curved surface, and the engaging portion is engaged in the pulling direction with respect to the attachment. Can be positioned. Therefore, the holding state can be easily changed from the holding release state. Similarly, the holding portion of the holding metal can be easily changed from the holding state to the holding release state by sliding on the curved metal fitting contact surface.

According to a third aspect of the present invention, in the insertion portion holding structure according to the second aspect, in the holding state, the locking portion is pressure-bonded to the metal fitting contact surface.
According to the said invention, since a latching | locking part is crimped | bonded with respect to a metal fitting contact surface in the holding | maintenance state, the movement of an attachment can be reliably latched by the latching | locking part of a holding metal fitting.

  According to a fourth aspect of the present invention, in the insertion portion holding structure according to the second or third aspect, the trajectory of the locking portion that rotates about the rotation center axis in accordance with the rotation of the holding fitting is expressed as “fitting rotation”. When it is referred to as “trajectory”, the metal fitting contact surface is a curved surface having a larger curvature than the metal fitting rotation locus when viewed from a direction parallel to the rotation center axis.

  According to the above invention, when the holding fitting is rotated, the distance between the holding portion of the holding fitting that is not in contact with the fitting contacting surface of the attachment and the fitting contacting surface of the attachment is gradually reduced. It can be constituted as follows. Therefore, when the holding metal fitting is rotated, the engaging portion of the holding metal fitting can be slid on the metal fitting abutting surface which is a curved surface, and the engaging portion can be easily crimped to the metal fitting abutting surface.

  The invention according to claim 5 is the insertion portion holding structure according to any one of claims 2 to 4, wherein the attachment is provided with a metal fitting holding projection for holding the holding metal fitting in a holding state. It is characterized by being.

  According to the above invention, it is possible to suppress the change from the holding state to the holding release state due to an external force applied to the holding metal fitting, and the holding state can be easily maintained. In addition, when the latching portion is crimped to the metal fitting contact surface in the holding state, the holding state when the latching portion is crimped to the metal fitting contact surface is maintained, so that the attachment The movement can be more reliably locked.

  Invention of Claim 6 is the insertion part holding | maintenance structure as described in any one of Claims 1-5, The inner periphery which can pass a part of said insertion part is passed through the said attachment. A through-hole is formed, and the attachment has a direction through which the through-hole penetrates the attachment as a `` penetration direction '', and when viewed from the penetration direction, the attachment has an external direction that is perpendicular to the penetration direction. An open portion that opens the inner periphery of the through hole is formed, and the open portion is formed to allow the cord to pass therethrough, and the size of the open portion is larger than the size of the through hole when viewed from the outside direction. It is small.

  According to the above invention, after passing the cord from the open portion to the through hole, the attachment is moved to the insertion portion, and a part of the insertion portion of the cord is attached by passing a part of the insertion portion through the through hole. Can be passed through. A state in which a part of the cord insertion portion passes through the attachment through-hole in this manner is referred to as an “attachment attachment state”. For cords where the dimensions of the part of the insertion part are larger than the dimension of the opening part viewed from the outside direction perpendicular to the penetration direction, part of the insertion part of the cord passes through the opening part to the external direction of the attachment. Can't move on. Therefore, it is possible to prevent the attachment from being removed from the insertion portion of the cord having a size that is part of the insertion portion larger than that of the opening portion viewed from the external direction perpendicular to the penetration direction.

The invention according to claim 7 is the insertion portion holding structure according to any one of claims 1 to 6, wherein the attachment is formed of a synthetic resin material.
According to the said invention, the attachment of the shape corresponding to the shape of the insertion part of various cords and corresponding to the shape of a holding metal fitting can be easily formed using a metal mold | die.

The invention according to claim 8 is characterized by including the insertion portion holding structure according to any one of claims 1 to 7.
According to the above invention, since the plug holding structure having the above effects is provided, for example, the plug holding structure is adopted as the plug holding structure of the power cord, and the power cord is accidentally pulled. It can be prevented from being pulled out. Therefore, it is possible to improve the reliability of the projector main body apparatus that is an electric device constituting the projection display apparatus and that projects and displays an image and continues to display the image by receiving power supply from the outside.

  According to the present invention, in various cords, even if the shape of the cord insertion portion is different, it corresponds to the shape of the insertion portion of the various cords and corresponds to the shape of the holding metal fitting. By using the formed attachment, it is possible to securely hold the insertion portion so as not to be pulled out from the cord insertion portion without changing the shape of the holding metal fitting.

The perspective view which shows the external appearance of the electric equipment which concerns on one Embodiment of this invention. The elements on larger scale of FIG. 1 which show the cord insertion part provided in the electric equipment of the embodiment. The perspective view which shows the insertion part holding structure which the projection type video display apparatus of the embodiment has. (A) (b) The figure which shows the holding metal fitting which comprises the insertion part holding structure of the embodiment. (A)-(f) The figure which shows the attachment which comprises the insertion part holding | maintenance structure of the embodiment. The perspective view of the attachment which comprises the insertion part holding structure of the embodiment. (A) (b) The figure which shows the holding metal fitting which comprises the insertion part holding structure of the embodiment. The schematic diagram which shows the state by which the insertion part is not inserted in the cord insertion port, and the state by which the attachment is not mounted | worn with the insertion part about the insertion part holding structure of the embodiment. About the insertion part holding structure of the embodiment, (a) is a schematic diagram showing a state where the insertion part is inserted into the cord insertion port, and a state where an attachment is attached to the insertion part, FIG. 4B is a schematic diagram illustrating a state where the insertion portion inserted into the cord insertion port is held. About the insertion part holding structure of the embodiment, (a) is a schematic diagram showing a state where the insertion part is not inserted into the cord insertion port and a state where no attachment is attached to the insertion part, FIG. 4B is a schematic diagram illustrating a state where the insertion portion inserted into the cord insertion port is held. The perspective view which shows the cord insertion part of a comparative example. The enlarged view which shows the insertion part holding structure of the comparative example. The schematic diagram which shows the state by which the insertion part is not inserted in the cord insertion port about the insertion part holding structure of the comparative example. About the insertion part holding | maintenance structure of the comparative example, (a) is a schematic diagram which shows the state by which the insertion part is inserted in the cord insertion port, and the state by which the insertion part is not hold | maintained, (b) These are the schematic diagrams which show the state by which the insertion part inserted in the cord insertion port is hold | maintained.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, a projector main body device 1 that is an electric device includes a housing 11 that houses electronic components, optical components, and the like, and a projection lens 12 that projects image light. The projector main body device 1 constituting the projection video display device projects light on a plane such as a screen or a wall by projecting light from the projection lens 12 and displays it.

  The projector main body device 1 has a power cord insertion part 13 for receiving power supply from the outside of the projector main body device 1. The power cord insertion portion 13 is provided with a plug receiver 2 having a cord insertion port 21 and a holding metal fitting 3 formed of a metal material such as stainless steel.

  As shown in FIG. 2, the power cord insertion portion 13 is provided in an opening 11 a provided in the housing 11. The housing 11 is provided with a support plate 14 that covers the opening 11a and supports the plug receiver 2 provided in the opening 11a. The plug receiver 2 is fixed to the support plate 14 by screws 15 and is fixed to the housing 11 via the support plate 14.

  The plug receptacle 2 formed of an insulating resin material is a power inlet to which power supplied from the outside of the projector main body device 1 is input. The plug receiver 2 to which electric power is input from an AC power supply is a so-called AC inlet. The plug receiver 2 has a frame portion 22 that is fixed to the support plate 14 by screws 15 and a cord insertion port 21 that is recessed from the frame portion 22 to the inside of the housing 11. A metal terminal 23 is provided at the cord insertion port 21. The metal terminal 23 is composed of three blades (pins).

  The housing 11 is provided with a shaft support portion 11b to which the holding metal fitting 3 is attached. The shaft support portion 11 b is configured by a through hole or a groove formed in the housing 11. The housing 11 is provided with two shaft support portions 11b at intervals in the direction indicated by the arrow Z in the drawing. The holding metal fitting 3 supported by the shaft support portion 11b can rotate in the direction indicated by the arrow R in the figure with respect to the projector main body 1 around the rotation center axis indicated by the one-dot chain line A in the figure.

  As shown in FIG. 3, in the insertion portion holding structure of the present embodiment, the holding metal fitting 3 holds the plug 41 </ b> A of the power cord 4 </ b> A inserted into the cord insertion port 21 via the attachment 5. The power cord 4A is a cord provided with a plug 41A as an insertion portion. The plug 41A is provided with a blade bracket (not shown) connected to the metal terminal 23. When the plug 41A is inserted into the cord insertion port 21, the blade bracket of the plug 41A and the metal terminal 23 are connected.

  As shown in FIGS. 4A and 4B, the holding metal fitting 3 is formed in a wire shape. 4A is a view of the holding metal fitting 3 viewed from a direction parallel to the arrow Z1 in FIG. 4B, and FIG. 4B is parallel to the arrow Y1 in FIG. 4A. It is the figure which looked at the holding metal fitting 3 from various directions. Each arrow X1, Y1, Z1 in the figure indicates a direction orthogonal to each other. Note that a two-dot chain line in FIG. 4B indicates a locus of the locking portion 33 that rotates around the rotation center axis as the holding metal fitting 3 rotates.

  The holding metal fitting 3 has an attachment shaft portion 31 attached to the shaft support portion 11 b of the housing 11. The attachment shaft portion 31 is configured by both end portions of the wire-like holding metal fitting 3. In addition, the holding metal fitting 3 has an extending portion 32 that is bent from the attachment shaft portion 31 that is both ends and extends in the direction indicated by the arrow X1. The extending portions 32 provided at intervals in the direction indicated by the arrow Z1 extend in a direction parallel to the arrow X1. In addition, the holding metal fitting 3 includes a locking portion 33 formed by being bent from the extending portion 32 and an operation portion 34 for operating the rotation operation of the holding metal fitting 3. The locking part 33 extending in the direction indicated by the arrow Z <b> 1 is a part that locks the movement of the attachment 5. The operation portion 34 is formed by being bent from a locking portion 33 provided at an interval in the direction indicated by the arrow Z1. The operation unit 34 is formed obliquely with respect to the direction indicated by the arrow X1. That is, the operation unit 34 extends in the direction indicated by the arrow X1 and extends in the direction indicated by the arrow Y1.

  As shown in FIGS. 5A to 5F and FIG. 6, the attachment 5 has a circular inner periphery 5a. FIGS. 5A and 5D are views of the attachment 5 viewed from a direction parallel to the arrow Y2 in FIG. FIGS. 5B and 5C are views of the attachment 5 viewed from a direction parallel to the arrow X2 in FIG. FIGS. 5E and 5F are views of the attachment 5 viewed from a direction parallel to the arrow Z2 in FIG. Each arrow X2, Y2, Z2 in the figure indicates directions orthogonal to each other.

  A through hole 51 having an inner periphery 5a is formed in the attachment 5 formed of a synthetic resin material such as polycarbonate. The through hole 51 passes through the attachment 5 in a direction parallel to the arrow Y2. When the direction in which the through-hole 51 penetrates the attachment 5 is defined as a “penetration direction”, the attachment 5 extends in the direction external to the attachment 5 (see arrow E in the figure), which is a direction perpendicular to the penetration direction when viewed from the penetration direction. In addition, an open portion 52 that opens the inner periphery 5a of the through hole 51 is provided. As shown in FIG. 5 (a), the attachment 5 is such that the dimension S2 of the opening 52 is smaller than the dimension S1 of the through hole 51 when viewed from the direction parallel to the external direction indicated by the arrow E in the figure. Is formed.

  Further, the attachment 5 has a metal abutment surface 53 that abuts on the locking portion 33 of the holding metal 3. The metal fitting contact surface 53 is a curved surface that is curved along the direction in which the holding metal fitting 3 rotates. When the locus of the locking portion 33 that rotates around the rotation center axis with the rotation of the holding metal fitting 3 is defined as a “metal fitting rotation locus”, the metal fitting abutment is seen from a direction parallel to the rotation center axis of the holding metal fitting 3. The surface 53 has a larger curvature than the metal fitting rotation locus.

  Further, the attachment 5 is provided with a metal fitting holding projection 54 for holding the extending portion 32 of the holding metal fitting 3 and a slit 55 for giving elasticity to a portion where the metal fitting holding projection 54 is formed. The metal fitting holding protrusion 54 is constituted by a pair of protrusions provided side by side in the direction indicated by the arrow X2. The pair of slits 55 extending in the direction indicated by the arrow Y2 is provided at a position sandwiching the metal fitting holding protrusion 54 in the direction indicated by the arrow X2. Since the slit 55 is formed, the portion where the metal fitting holding projection 54 is provided can be greatly elastically deformed in the direction of the arrow Z2 as compared with the case where the slit 55 is not formed.

  As shown in FIG. 6, the attachment 5 is provided with protrusions 56 and 57 on the opposite side of the metal fitting contact surface 53. The protrusions 56 and 57 are formed in accordance with the shapes of the plugs 41A and 41B shown in FIGS. 7 (a) and 7 (b).

  As shown in FIGS. 7A and 7B, the attachment 5 is attached to the power cords 4A and 4B provided with the plugs 41A and 41B. The inner periphery 5a of the through hole 51 is formed so that a part of the plugs 41A and 41B as insertion parts can be passed therethrough, and the open part 52 is formed so that the power cords 4A and 4B can be passed therethrough. Yes. 7 (a) and 7 (b), the attachment 5 is shown in a cross section cut at a position that bisects the dimension in the direction indicated by the arrow Z in FIG.

  Similarly to the power cord 4A, the power cord 4B is a cord provided with a plug 41B as an insertion portion. The plug 41B is provided with a blade receiving bracket (not shown) connected to the metal terminal 23. ing. When the plug 41B is inserted into the cord insertion port 21, the blade bracket of the plug 41B and the metal terminal 23 are connected.

  The power cords 4A and 4B provided with plugs 41A and 41B to be inserted into the cord insertion port 21 have different shapes. The plugs 41A and 41B have plug body portions 42A and 42B, insertion portions 43A and 43B inserted into the cord insertion port 21, and bending suppression portions 44A and 44B that suppress the bending of the power cords 4A and 4B. ing.

  As shown in FIG. 7A, when the attachment 5 is attached to the plug 41A through the deflection suppressing portion 44A in the through hole 51, the protrusion 56 formed in accordance with the shape of the plug 41A is in contact with the plug main body portion 42A. Touch. Further, as shown in FIG. 7B, when the attachment 5 is attached to the plug 41B through the deflection suppressing portion 44B in the through hole 51, the protrusion 57 formed in accordance with the shape of the plug 41B has a plug main body portion 42B. Abut. Thus, when the attachment 5 corresponding to the shape of the plugs 41A and 41B is attached to the plugs 41A and 41B, the distance LA from the distal end of the insertion portion 43A to the metal fitting contact surface 53, and the metal fitting contact from the tip of the insertion portion 43B. The distance LB to the surface 53 is substantially the same.

  When attaching the attachment 5 to the plug 41A, after passing the power cord 4A from the opening portion 52 to the through hole 51, the attachment 5 is brought to the plug 41A and the deflection suppressing portion 44A is passed through the through hole 51, thereby A deflection suppressing portion 44A which is a part of the plug 41A of the cord 4A is passed through the through hole 51 of the attachment 5. Further, when the attachment 5 is attached to the plug 41B, the deflection suppressing portion 44B which is a part of the plug 41B of the power cord 4B can be passed through the through hole 51 of the attachment 5 in the same manner as when the plug 41A is attached. it can. In this way, when the deflection suppressing portions 44A and 44B are passed through the through hole 51 of the attachment 5, the dimensions of the deflection suppressing portions 44A and 44B are larger than the dimension S2 of the opening portion 52 viewed from the outside direction perpendicular to the penetration direction. For the power cords 4 </ b> A and 4 </ b> B having a large length, the bending suppression portions 44 </ b> A and 44 </ b> B cannot move to the outside of the attachment 5 through the opening portion 52.

  With reference to FIGS. 8 to 10, a method of attaching the power cords 4 </ b> A and 4 </ b> B to the projector main body device 1 provided with the cord insertion port 21 will be described in detail. 8 and 9 show a process of inserting the plug 41A into the cord insertion port 21 and holding it. FIG. 10 shows a simplified process of inserting and holding the plug 41B into the cord insertion port 21. The arrow N in the figure indicates the “insertion direction” which is the direction in which the plugs 41A and 41B are inserted into the cord insertion port 21. Further, an arrow F in the figure indicates a “drawing direction” which is a direction opposite to the insertion direction and is a direction in which the plugs 41A and 41B are pulled out from the cord insertion port 21.

  As shown in FIG. 8, when the power cord 4A is attached to the power cord insertion portion 13, first, the retaining bracket 3 is rotated to provide the retaining bracket 3 at the unlocking position shown in FIG. The plug 41A of the power cord 4A can be inserted into the slot 21. In FIG. 8, the unlocking position where the holding metal fitting 3 is provided is also a position where the plug 41 </ b> A of the power cord 4 </ b> A can be pulled out from the cord insertion port 21.

  Next, in a state where the holding metal fitting 3 is provided at the unlocking position, the plug 41A is inserted into the cord insertion port 21, and then the attachment 5 is attached to the plug 41A. Alternatively, after the attachment 5 is attached to the plug 41A, the plug 41A to which the attachment 5 is attached is inserted into the cord insertion port 21 in a state where the holding metal fitting 3 is provided at the unlocked position. In this way, as shown in FIG. 9A, the plug 41A is inserted into the cord insertion port 21, and the attachment 5 is attached to the plug 41A. The state shown in FIG. 9A in which the holding metal fitting 3 is not engaged with the attachment 5 and the plug 41A can be moved in the pulling direction is referred to as a “holding release state”.

  Then, by rotating the holding metal fitting 3 from the holding release state and providing the holding metal fitting 3 at the lock position shown in FIG. 9B, the holding metal fitting 3 is inserted into the cord insertion port 21 and the plug 41A of the power cord 4A. Hold. That is, the holding metal fitting 3 restricts the plug 41A and the attachment 5 from moving in the pulling direction. When the holding metal fitting 3 is engaged with the attachment 5 to restrict the movement of the plug 41A in the pulling direction and the state shown in FIG. 33 is pressure-bonded to the metal fitting contact surface 53 of the attachment 5. Moreover, the metal fitting holding projection 54 holds the holding metal fitting 3 in the holding state.

  Further, as shown in FIG. 10A, when the power cord 4B is attached to the power cord insertion portion 13, as in FIG. 8, the retaining bracket 3 is first rotated to provide the retaining bracket 3 at the unlocked position. Thus, the plug 41B of the power cord 4B can be inserted into the cord insertion port 21. Then, in a state where the holding metal fitting 3 is provided at the unlocking position, the plug 41B is inserted into the cord insertion port 21, and then the attachment 5 is attached to the plug 41B. Alternatively, after the attachment 5 is attached to the plug 41B, the plug 41B to which the attachment 5 is attached is inserted into the cord insertion port 21 in a state where the holding metal fitting 3 is provided at the unlocked position.

  Then, from the holding release state in which the holding metal fitting 3 is not engaged with the attachment 5 and the plug 41B can move in the pulling direction, the holding metal fitting 3 is rotated to bring the holding metal fitting 3 into the lock position shown in FIG. By providing, the holding metal fitting 3 holds the plug 41 </ b> B of the power cord 4 </ b> B inserted into the cord insertion port 21. That is, the holding metal fitting 3 restricts the plug 41B and the attachment 5 from moving in the pulling direction. Even in the holding state in which the holding metal fitting 3 is engaged with the attachment 5 and restricts the movement of the plug 41B in the pulling direction, the locking portion 33 of the holding metal fitting 3 is pressed against the metal fitting contact surface 53 of the attachment 5. The Moreover, the metal fitting holding projection 54 holds the holding metal fitting 3 in the holding state.

  As described above, the locking portion 33 that changes from the holding release state to the holding state by the rotation of the holding metal fitting 3 and is positioned in the pulling direction with respect to the attachment 5 in the holding state is the attachment 5 and the plug for the projector main body device 1. The movement of 41A and 41B is regulated.

(Function)
The operation of the present invention when holding the plugs 41A and 41B will be described. By attaching the attachment 5 detachably to the plugs 41A and 41B to the plugs 41A and 41B, the attachment 5 and the plugs 41A and 41B can be engaged. When the holding metal fitting 3 is provided at the lock position in a state where the plugs 41A and 41B are inserted into the cord insertion port 21, the holding metal fitting 3 engages with the attachment 5 attached to the plugs 41A and 41B. Then, when the holding metal fitting 3 and the attachment 5 are engaged in the holding state, the holding metal fitting 3 restricts the movement of the attachment 5 and the plugs 41 </ b> A and 41 </ b> B in the pulling direction with respect to the projector main body device 1.

According to the present embodiment, the following effects can be obtained.
(1) When the attachment 5 is attached to the plug 41A, the attachment 5 and the plug 41A are engaged, and the holding metal fitting 3 is attached to the plug 41A in a state of being inserted into the cord insertion port 21. The attachment 5 is engaged. Then, when the holding metal fitting 3 and the attachment 5 are engaged, the holding metal fitting 3 restricts the movement of the attachment 5 and the plug 41 </ b> A in the pulling direction with respect to the projector main body device 1. Further, even when the attachment 5 is attached to the plug 41B, the holding fixture 3 and the attachment 5 are engaged with each other in the same manner as when the attachment 5 is attached to the plug 41A. The movement of the plug 41B in the pulling direction is restricted. That is, when the holding metal fitting 3 is engaged with the attachment 5, the attachment 5 and the plugs 41A and 41B engaged with the attachment 5 are restricted from moving in the pulling direction. For this reason, even when the shapes of the plugs 41A and 41B are different, the attachment 5 corresponding to the shape of the plugs 41A and 41B and the shape corresponding to the shape of the holding metal fitting 3 is used for holding. Without changing the shape of the metal fitting 3, the plugs 41A and 41B can be securely held so as not to be pulled out from the cord insertion port 21.

  (2) Since the metal fitting contact surface 53 of the attachment 5 is a curved surface that is curved along the direction in which the holding metal fitting 3 rotates, the engagement of the holding metal fitting 3 that rotates when changing from the holding release state to the holding state. The locking part 33 can be slid on the metal fitting contact surface 53 which is a curved surface, and the locking part 33 can be positioned in the pulling direction with respect to the attachment 5. Therefore, the holding state can be easily changed from the holding release state. Similarly, the latching portion 33 of the holding metal fitting 3 can be slid on the metal fitting contact surface 53 which is a curved surface to easily change from the holding state to the holding release state.

  (3) Since the locking portion 33 of the holding metal fitting 3 is pressed against the metal fitting contact surface 53 of the attachment 5 in the holding state, the movement of the attachment 5 is reliably locked by the locking portion 33 of the holding metal fitting 3. be able to.

  (4) The metal fitting abutment surface 53 of the attachment 5 is a curved surface having a larger curvature than the metal fitting rotation locus when viewed from a direction parallel to the rotation center axis of the holding metal fitting 3. For this reason, when the holding metal fitting 3 is rotated, the interval between the locking portion 33 of the holding metal fitting 3 that is not in contact with the metal fitting contact surface 53 of the attachment 5 and the metal fitting contact surface 53 of the attachment 5 is It can be configured to gradually narrow. Therefore, when the holding metal fitting 3 is rotated, the engaging portion 33 of the holding metal fitting 3 is slid on the metal fitting abutting surface 53 which is a curved surface, and the engaging portion 33 is easily crimped to the metal fitting abutting surface 53. Can be made.

  (5) Since the attachment 5 is provided with the metal fitting holding projection 54 for holding the holding metal fitting 3 in the holding state, it is possible to suppress a change from the holding state to the holding releasing state due to an external force applied to the holding metal fitting 3. This makes it easy to maintain the holding state. Further, since the locking portion 33 of the holding metal fitting 3 is pressed against the metal fitting contact surface 53 in the holding state, the holding state when the locking portion 33 is pressed against the metal fitting contact surface 53 is maintained. By doing so, the movement of the attachment 5 can be more reliably locked.

  (6) The deflection suppressing portions 44 </ b> A and 44 </ b> B of the plugs 41 </ b> A and 41 </ b> B cannot move toward the outside of the attachment 5 through the opening portion 52. Therefore, for the power cords 4A and 4B in which the dimensions of the deflection suppressing portions 44A and 44B of the plugs 41A and 41B are larger than the dimension S2 of the open portion 52 as viewed from the outside direction perpendicular to the penetration direction, the attachment 5 from the plugs 41A and 41B Can be prevented.

  (7) The attachment 5 is formed of a synthetic resin material. For this reason, the attachment 5 having a shape corresponding to the shape of the plugs 41A and 41B of the various power cords 4A and 4B and corresponding to the shape of the holding metal fitting 3 can be easily formed using a mold.

  (8) Since the projection-type image display device constituted by the projector main body device 1 and the like has the insertion portion holding structure, the insertion portion holding is held in the holding structure of the plugs 41A and 41B of the power cords 4A and 4B. By adopting the structure, it is possible to prevent the power cords 4A and 4B from being pulled out by mistake. Accordingly, it is possible to improve the reliability of the projector main body device 1 that is an electric device constituting the projection display apparatus and that projects and displays an image and continues to display the image by receiving power supply from the outside.

  The effects described in the above (2) and (3) will be described in comparison with the comparative examples shown in FIGS. As shown in FIG. 11, the power supply cord insertion portion 113 of the comparative example is provided with a holding metal fitting 103 formed so as to hold the plug 41 </ b> A without the attachment 5. The holding metal fitting 103 includes an attachment shaft portion 131 that is attached to the shaft support portion 11b, an extension portion 132 that is bent and extended from the attachment shaft portion 31, and a locking portion 133 that is formed by being bent from the extension portion 32. Have. The holding metal fitting 103 supported by the shaft support portion 11b can be rotated in the direction indicated by the arrow R in the figure with respect to the projector main body 1 around the rotation center axis indicated by the one-dot chain line A in the figure. As shown in FIG. 12, the locking part 133 is a part that locks the movement of the attachment 5.

  As shown in FIG. 13, when the power cord 4A is attached to the power cord insertion portion 113 of the comparative example, first, the holding metal fitting 103 is rotated to provide the holding metal fitting 103 at the unlocking position shown in FIG. The plug 41A of the power cord 4A can be inserted into the cord insertion port 21. In FIG. 13, the unlocking position where the holding metal fitting 103 is provided is also a position where the plug 41 </ b> A of the power cord 4 </ b> A can be pulled out from the cord insertion port 21.

  Next, in a state where the holding metal fitting 103 is provided at the unlocking position, the plug 41A is inserted into the cord insertion port 21. In this way, as shown in FIG. 14A, the plug 41A is inserted into the cord insertion port 21. The state shown in FIG. 14A in which the holding metal fitting 103 is not engaged with the plug 41A and the plug 41A can move in the pulling direction is referred to as a “holding release state”.

  Then, by rotating the holding metal fitting 103 from the holding release state and providing the holding metal fitting 103 at the lock position shown in FIG. 14B, the holding metal fitting 103 is inserted into the cord insertion port 21 and the plug 41A of the power cord 4A. Hold. That is, the holding metal fitting 103 restricts the plug 41A from moving in the pulling direction. The state shown in FIG. 14B in which the holding metal fitting 103 engages with the plug 41A and restricts the movement of the plug 41A in the pulling direction is referred to as a “holding state”.

  In the comparative example, as shown in FIG. 14B, since a slight gap is formed between the plug main body portion 42A and the locking portion 133 in the holding state, the locking portion 133 of the holding metal fitting 103 is plugged. There is an inconvenience that it is not crimped to 41A. When a gap is not formed between the plug main body portion 42A and the locking portion 133 in the holding state, the locking portion 133 of the holding metal fitting 103 is connected to the plug main body portion when the holding state is changed to the holding state. There is a disadvantage in that it cannot be easily changed from the holding release state to the holding state by being caught by 42A.

  On the other hand, in the present invention, it is easy to absorb the dimensional tolerance, and as described in the above (2) and (3), by using the attachment 5, the engaging portion 33 of the holding metal 3 is attached to the metal abutment surface of the attachment 5. Further, it can be crimped to 53, and can be easily changed from the holding release state to the holding state by sliding the locking portion 33 on the curved metal fitting contact surface 53.

  The present invention is not limited to the above embodiment, and various design changes can be made based on the spirit of the present invention, and they are not excluded from the scope of the present invention. For example, the above embodiment may be modified as follows, or the following modifications may be combined.

  -You may change the shape of the attachment 5 of the said embodiment suitably. That is, the attachment 5 may be formed according to the shape of a plug (not shown) other than the plugs 41A and 41B. The plugs 41 </ b> A and 41 </ b> B can be held without forming the metal fitting holding protrusion 54 and the slit 55 on the attachment 5.

  In the above embodiment, the insertion portion holding structure is a structure that holds the plugs 41A and 41B of the power cords 4A and 4B, but a structure that holds the insertion portion provided in a cord other than the power cords 4A and 4B. It can also be adopted.

  DESCRIPTION OF SYMBOLS 1 ... Projector main body apparatus (electric equipment), 2 ... Plug receptacle, 3 ... Holding bracket, 4A, 4B ... Power cord (cord), 5 ... Attachment, 5a ... Inner circumference, 11 ... Housing, 13 ... Power cord insertion , 21 ... cord insertion port, 23 ... metal terminal, 31 ... mounting shaft part, 32 ... extension part, 33 ... locking part, 34 ... operation part, 41A, 41B ... plug (insertion part), 42A, 42B ... Insertion part, 43A, 43B ... Plug body part, 44A, 44B ... Deflection suppression part, 51 ... Through hole, 52 ... Opening part, 53 ... Metal fitting contact surface, 54 ... Metal fitting holding projection, 55 ... Slit, 56, 57 ... Protrusions.

Claims (8)

An electrical device provided with a cord insertion port; and a cord provided with an insertion portion to be inserted into the cord insertion port; and the insertion portion in a state of being inserted into the cord insertion port. , In the insertion portion holding structure for holding so as not to be pulled out from the cord insertion port,
The direction in which the insertion portion is inserted into the cord insertion port is referred to as “insertion direction”, and the direction in which the insertion portion is pulled out from the cord insertion port in the opposite direction to the insertion direction is referred to as “extraction direction”. When
By attaching an attachment that is detachable with respect to the insertion portion to the insertion portion, the attachment and the insertion portion are engaged,
A holding fitting attached to the electrical device is engaged with the attachment attached to the insertion portion in a state of being inserted into the cord insertion port,
The insertion part holding structure, wherein the holding metal part and the attachment engage with each other, whereby the holding metal part restricts movement of the attachment and the insertion part in the pull-out direction with respect to the electric device. A state in which the holding metal engages with the attachment and restricts the movement of the insertion portion in the extraction direction is referred to as a “holding state”, and the insertion in the extraction direction without the holding metal engaging with the attachment. When the state in which the part can be moved is set to the “hold release state”,
The holding bracket is provided so as to be rotatable about a predetermined rotation center axis with respect to the electrical device,
Changes from the holding release state to the holding state by the rotation of the holding bracket,
The holding metal fitting has a locking portion positioned in a pulling direction with respect to the attachment in the holding state, and the locking portion locks the movement of the attachment with respect to the electric device in the holding state,
The attachment has a fitting contact surface that contacts the locking portion, and the fitting contact surface is a curved surface that is curved along a direction in which the holding fitting rotates. 1. The insertion part holding structure according to 1. The insertion portion holding structure according to claim 2, wherein the locking portion is pressure-bonded to the metal fitting contact surface in the holding state. When the locus of the locking portion that rotates around the rotation center axis in accordance with the rotation of the holding bracket is referred to as a “metal rotation locus”,
4. The insertion portion holding structure according to claim 2, wherein the metal fitting contact surface is a curved surface having a larger curvature than a metal fitting rotation locus when viewed from a direction parallel to the rotation center axis. The insertion part holding structure according to any one of claims 2 to 4, wherein the attachment is provided with a metal fitting holding protrusion for holding the holding metal fitting in a holding state. The attachment is formed with a through hole having an inner periphery through which a part of the insertion portion can pass.
The attachment opens the inner periphery of the through-hole in an external direction of the attachment, which is a direction perpendicular to the penetration direction when viewed from the penetration direction, with a direction in which the through-hole penetrates the attachment as a “penetration direction”. Has an opening to
The open portion is formed so as to allow the cord to pass therethrough, and the size of the open portion is smaller than the size of the through hole as viewed from the outside direction. The insertion portion holding structure according to one item. The said attachment is formed with a synthetic resin material. The insertion part holding structure as described in any one of Claims 1-6 characterized by the above-mentioned.   A projection display apparatus comprising the insertion portion holding structure according to any one of claims 1 to 7.

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