JP5044281B2 - Slide rotation mounting unit and mobile phone - Google Patents

Description

  The present invention relates to a slide rotation mounting unit for mounting a movable housing so as to rotate while sliding at least partially overlapping a holding base, and a mobile phone using the unit.

In a mobile phone, an electronic notebook, a personal computer, and other electronic devices, a thin display unit housing having a display unit is vertically long (for example, a mobile phone) or horizontally long (for example, a notebook type or other personal computer). Is fixed in a vertically or horizontally long state, it is inconvenient when viewing the display screen or performing an input operation while looking at it. In other words, depending on the type of input work and the display target when inputting data such as document creation or table creation and when viewing the results and images on the display screen, the landscape screen and the portrait screen are suitable. There is.
Therefore, in the electronic apparatus as described above, the display unit casing is made a movable casing, which is rotated by 90 degrees as necessary, so that it can be converted into a vertically long state and a horizontally long state.

In the electronic device, a holding base is pivotally attached to one end of a base casing having an input portion by a hinge, or a desktop holding base is installed separately from the input portion and the PC main body, and these holding bases are installed. A movable casing, which is an input section casing, is attached so as to partially overlap with each other via a slide rotation mounting unit.
The inventors have already proposed a slide rotation mounting unit that can make the rotating operation of the movable casing smoother and can be easily designed to rotate the movable casing in the forward and reverse directions.

The inventors have proposed the following configuration (Patent Document 1 described later).
That is, a slide rotation mounting unit that is mounted so as to rotate while sliding a movable casing in a state where at least a part thereof overlaps with the holding base, and a screw on the holding base side on the opposing surface of the holding base and the movable casing A base plate attached by fastening and a plate cam attached by screwing on the movable housing side are provided.
The base plate is provided with a guide slit along a vertical direction in a reference posture which is a basic use state of the movable housing, and a guide pin with which a cam portion of the plate cam slides on an extension of a lower end portion of the guide slit, The plate cam is provided with an attachment shaft that is slidably and rotatably engaged with the guide slit in a state of being prevented from coming off.
Each cam portion that is in sliding contact with the guide pin of the plate cam is formed with a recess for guiding the guide pin when the movable housing is in the reference posture and rotated 90 degrees to the left and right from the reference posture. The plate cam is configured to always be urged downward by a torsion spring attached to the side of the base plate facing the holding base.

In order to screw the plate cam to the movable housing and to screw the base plate to the holding base, female screw bosses are formed on the plate cam and the base plate by burring (pushing and bending) processing. Both of the above were screwed using a female screw boss.
The slide rotation mounting unit has been able to achieve its purpose sufficiently. However, for example, in recent mobile phones, where further reduction in thickness and weight has been demanded, the slide cam and the base plate are further layered. When using a thin metal plate, the female screw boss may be insufficient in thickness or height.
Description and drawings attached to Japanese Patent Application No. 2006-304594

An object of the present invention is to improve the shortage of the thickness and height of the female screw boss, and the object is to have a sufficient thickness and height even when a thin metal plate material is used by a plate cam or a base plate. An object of the present invention is to provide a slide rotation mounting unit capable of processing a female screw boss.
Another object of the present invention is to provide a mobile phone that can achieve further reduction in thickness and weight.

A slide rotation mounting unit according to the present invention is a slide rotation mounting unit that is mounted so as to rotate while sliding a movable housing in a state where at least a part of the slide rotation mounting unit overlaps a holding base. A base plate that is attached to the holding base by screwing on the opposing surface of the base and the movable housing, and that is attached to the movable housing by screwing and slides a predetermined amount relative to the base plate in the vertical direction. ; and a plate cam mounted to rotate respectively by 90 degrees to the left and right by a cam control, female screw bosses for the plate cam and the base plate respectively screwed in are formed by meat gathering while, said base The plate is provided with a guide slit along the vertical direction in a reference posture which is a basic use state of the movable casing, and the guide slit. A guide pin with which the cam portion of the plate cam is slidably contacted on the extension of the lower end of the base plate is provided, and the plate cam is provided with a mounting shaft that is slidably and rotatably engaged with the guide slit in a state of being prevented from coming off. The cam portion that is in sliding contact with the guide pin of the plate cam has concave portions to which the guide pin is guided when the movable housing is in the reference posture and rotated 90 degrees to the left and right from the reference posture. The plate cam is always urged downward by a torsion spring attached to the side of the base plate facing the holding base, and the torsion spring has a spiral coil portion and an end portion of the plate cam. A fixed arm which is locked or fixed to a base plate and is continuous with the outer peripheral coil of the spiral coil portion, and the spiral cam which comes into contact with the mounting shaft and biases the plate cam downward. The inner peripheral coil of the outer peripheral coil and a movable arm that is continuous are provided, and the position in the vicinity of the maximum diameter portion of the outer peripheral coil is pressed against the base plate by a pressing piece cut and raised to the base plate, and the movable side arm is continuous. The inner coil is positioned closer to the base plate than the other coil portions, and the end of the movable arm is pressed with a predetermined elasticity to the inside of the flange of the mounting shaft that is levitated from the surface of the base plate. It is the most important feature that is.

  In order to solve the above-described problems, a mobile phone according to the present invention includes the slide rotation mounting unit according to the present invention, wherein the holding base is attached to a transmitter-side housing having an input portion by a hinge, and the movable housing is provided. The body is an LCD casing.

  According to the slite rotation mounting unit according to the present invention, since the female cam bosses for screwing are formed on each of the plate cam and the base plate by fleshing, a thin metal plate material is used for the plate cam and the base plate. Even in this case, it is possible to form a female screw boss having a thickness sufficient to form a female screw inside and a height necessary for screwing.

  According to the mobile phone of the present invention, a slite rotation mounting unit in which female screw bosses for screwing are formed on the plate cam and the base plate by fleshing is used, and the transmission side housing having an input unit is used. Since the holding base is attached by a hinge and the movable casing is an LCD casing, further reduction in thickness and weight can be realized.

Hereinafter, an optimal embodiment of a slide rotation mounting unit according to the present invention and a folding mobile phone using the same will be described with reference to the drawings.
First Embodiment FIG. 1 is a partially exploded perspective view of a slide rotation mounting unit according to the first embodiment, FIG. 2 is a schematic perspective view of a folding mobile phone using the slide rotation mounting unit of FIG. 1, and FIG. FIG. 4 is a front view of the slide rotation mounting unit of the embodiment when the movable housing of the telephone is in the reference posture. FIG. 4 is a schematic view of the slide rotation mounting unit in a state where the plate cam is rotated 90 degrees clockwise from the state of FIG. FIG. 5 is a schematic plan view of the folding cellular phone when the slide rotation mounting unit is changed to the state shown in FIG. 4, FIG. 6 is an enlarged cross-sectional view of the female screw boss forming portion of the plate cam, and FIG. FIG. 8 is an enlarged cross-sectional view of the female screw boss formation portion of the base plate, and FIG. 9 is a partial enlarged cross-section of the torsion spring in the slide rotation unit of the first embodiment. FIG. 10, FIG. 10 is a partially enlarged cross-sectional view showing a modified form of the torsion spring, FIG. 11 is a partially enlarged cross-sectional view taken along the arrow AA in FIG. 7, and FIG. 12 is an enlarged plan view showing a state before the torsion spring is attached. FIG. 13 is an enlarged plan view showing a state after the torsion spring is attached, and FIG. 14 is an enlarged sectional view taken along arrow BB in FIG.

1 and 2, the holding base 3 overlaps the base casing 5 via a hinge 6 at one end of the base casing 5 of the mobile phone having a transmitter and an input unit (both not shown). It is connected so that it can be folded from the opened state to the opened state of about 150 to 170 degrees.
The holding base 3 rotates while sliding in a state where the lower part of the movable casing 4 which is an LCD casing having a receiver (not shown) is overlapped via the slide / rotation mounting unit a of the first embodiment. Is attached.

As shown in FIG. 1, the slide rotation mounting unit a has a base plate 1 attached to the holding base 3 by an appropriate number (four) of screws 1a on the opposing surfaces of the holding base 3 and the movable housing 4. And a plate cam 2 attached to the movable casing 4 by an appropriate number (three) of screws 2a.
The plate cam 2 is attached so as to rotate 90 degrees to the left and right by cam control while sliding a predetermined amount in the vertical direction with respect to the base plate 1.
Each screw 2a and each female screw boss 20 and 10 corresponding to each 1a are respectively formed on the plate cam 2 and the base plate 1 by fleshing,

A specific form of the slide rotation mounting unit a will be described below.
In this embodiment, a guide slit 11 is formed at a substantially central portion of the base plate 1 along the vertical direction in a reference posture that is a basic use mode (vertical display mode) of the movable housing 4. On the lower extension of the guide slit 11, a guide pin 12 projecting toward the plate cam 2 is attached upright so that the cam portion of the plate cam 2 (in this embodiment, the outer peripheral contour portion) is in sliding contact. ing.

The plate cam 2 is provided with a mounting shaft 21 that is slidably and rotatably engaged with the guide slit 11 in a state of being prevented from coming off. The plate cam 2 and the base plate 1 are connected to each other by the mounting shaft 21. Connected to slide and rotate.
The mounting shaft 21 has a hollow portion that is continuous in the axial direction and has a flange 21a at one end, and the flange 21a is engaged with both sides of the guide slit 11 of the base plate 1 in a retaining manner. The other end is passed through the guide slit 11 and secured to the mounting hole 22 of the plate cam 2.

The guide pin 12 is guided around the outer periphery of the plate cam 2 when the movable housing 4 is in a standard posture which is a normal use mode and when it is rotated 90 degrees to the left and right from the standard posture. A recess 23 is formed.
Therefore, the concave portion 23 is formed when the plate cam 2 is in the reference posture (FIG. 3) and when the plate cam 2 is rotated 90 degrees clockwise from the reference posture (FIG. 4). ) Includes a second recess 231 through which the guide pin 12 is guided, and a third recess 232 that is guided when the plate cam 2 is rotated 90 degrees counterclockwise from the reference posture.

In this embodiment, the plate cam 2 is always urged in the downward direction along the guide slit 11 by a spiral torsion spring 13 installed on the back side of the base plate 1.
As shown in FIGS. 3 and 7, the torsion spring 13 is continuous with the spiral coil portion 130, the stationary arm 131 that is continuous with the outer peripheral coil of the spiral coil portion 130, and the inner peripheral coil of the spiral coil portion 130. And a movable arm 132.
The distal end portion of the fixed side arm 131 is locked or fixed to the upper end on the back side of the base plate 1, and the movable side arm 132 is brought into contact with the upper and outer peripheral portions of the mounting shaft 21 with elasticity in the downward direction. The cam 2 is urged in the downward direction.

In order to attach the movable casing 4 to the holding base 3 by the slide rotation attachment unit a, the base plate 1 and the plate cam 2 are attached to the mounting shaft in a state where the elasticity of the torsion spring 13 is applied to the plate cam 2 as described above. 21 are connected in advance so as to be slidable and rotatable.
The small screws 1a are passed through the screw guides 31 provided on the bottom plate 30 of the holding base 3 from the back side of the holding base 3, and these small screws 1a are brought into contact with the surface of the base plate 1 facing the holding base 3 by fleshing. The base plate 1 is fixed to the holding base 3 by screwing into each formed female screw boss 10.
The other machine screws 2a are passed through the screw guides 41 provided on the bottom plate 40 of the movable housing 4 from the surface side of the movable housing 4, and these machine screws 2a are brought closer to the front side of the plate cam 2 by fleshing. Screwing into each formed female screw boss 20, the plate cam 2 is fixed to the back side of the movable housing 4.
When the movable casing 4 is attached to the holding base 3, the movable casing 4 is attached in a state where the lower end of the movable casing 4 does not come into contact with the hinge 6 (does not interfere) when the movable casing 4 rotates after the attachment.

  As described above, the folding cellular phone in which the movable casing 4 is attached to the holding base 3 by the slide rotation mounting unit a has the movable casing 4 in the reference orientation (the display unit is in the reference display mode) as shown in FIG. 3), the slide rotation mounting unit a is in a state where the guide pin 12 of the base plate 1 is guided to the first recess 230 of the plate cam 2 as shown in FIG.

In order to convert the movable casing 4 from the reference posture to a horizontally long display mode rotated 90 degrees clockwise, for example, as shown in FIG. 4, the movable casing 4 is pushed up (or lifted) along the holding base 3. ) Rotate clockwise. At this time, the attachment shaft 21 rotates while moving upward along the guide slit 11.
When the movable casing 4 is rotated 90 degrees clockwise as shown in FIG. 4, the guide pin 12 of the slide rotation mounting unit a is guided to the second recess 231 of the plate cam 2, and the movable casing 4 is shown in FIG. As shown in the figure, the posture is changed to a horizontally long state by rotating 90 degrees clockwise.
When the movable casing 4 is rotated 90 degrees counterclockwise, the movable casing 4 changes its posture to a horizontally long state that is 180 degrees opposite to that in FIG.
In a state where the plate cam 2 is raised to the highest level along the base plate 1, the movable arm 132 of the torsion spring 13 is inclined to the right on the back side of the base plate 1 as shown by a two-dot chain line in FIG. Presents.

In the cellular phone, the movable casing 4 is converted into a horizontally long posture and the guide pins 12 are guided to the left and right recesses 231 or 232, and at the same time, the display mode of the movable casing 3 is converted according to the posture. No switch is provided.
When the movable casing 4 returns from the horizontally long posture to the vertically long reference posture, a similar switch for adjusting the display mode to the posture is provided in the mobile phone.

The features of the slide rotation mounting unit a of the first embodiment will be specifically described below.
Formation of Female Screw Boss by Fleshing In order to form the female screw boss 20 by fleshing so as to protrude to the front side of the plate cam 2 (SUS), as shown in an enlarged view in FIG. By drawing the ring-shaped recess 20a on one or both sides of the plate around the planned portion, the meat of the recess 20a forming portion is brought closer to the position where the female screw boss is to be formed, and the portion of the plate cam 2 is Raise in the front direction.
The thickening due to the formation of the ring-shaped recess 20a is repeated until the thickened portion has a thickness as designed.
The center portion that has been raised and raised by the formation of the concave portion 20a is pressed in the rising direction to form a hole, and the hole forming position is shaped to protrude in the boss shape by pressing in the rising direction.
An internal thread is formed by a screw tap into the boss portion thus shaped.

The procedure for forming the female screw boss 10 on the base plate 1 (SUS) is the same as described above.
In this embodiment, as shown in an enlarged view in FIG. 8, a ring-shaped recess 10 a is formed on the back side and the front side by pressing around the boss formation planned position of the base plate 1, and the boss of the base plate 1 is formed. The part to be formed is raised in the back direction and the thickness of the part is increased.
The following is almost the same as the formation procedure of the female screw boss 20 described in FIG.

By forming the female screw bosses 10 and 20 as described above, the female screw bosses 10 and 20 have a necessary and sufficient thickness and height even when a thin metal plate is used due to the material of the base plate 1 and the plate cam 2. Thus, the base plate 1, the auxiliary base 3, the plate cam 2, and the movable housing 4 can be more firmly screwed.
Accordingly, it is possible to further reduce the thickness and weight of the slide rotation mounting unit and a small electronic device using the same.

Form of Torsion Spring and its Mounting Form The torsion spring 13 includes a spiral coil part 130 and a fixed side where the end part is locked or fixed to the base plate and is continuous with the outer peripheral coil of the spiral coil part 130. The arm 131 includes a movable arm 132 that contacts the mounting shaft 21 and urges the plate cam 2 downward to be continuous with the inner peripheral coil of the spiral coil portion 130.
Specifically, an L-shaped terminal bent portion 13a is formed at the distal end portion of the fixed side arm 131, and the terminal bent portion 13a is a locking piece formed to slightly protrude toward the back side of the base plate 1. 16 (FIGS. 3 and 7), and the terminal bending portion 13a is configured not to be detached from the locking piece 16 by a retaining piece 17 formed on the back side of the base plate 1.
In addition, as shown in FIG. 7, the fixed-side arm 131 is formed with an intermediate bent portion 13 c that is substantially U-shaped in a plan view and is recessed toward the spiral coil portion 130, and the intermediate bent portion 13 c and the spiral coil portion 130 are formed. Is in contact with the boss-like protrusion 15 formed on the base plate 1 inside.

The position in the vicinity of the maximum diameter portion of the outer peripheral coil is pressed against the base plate 1 by a presser piece 14 (FIGS. 3, 7 and 11) cut and raised to the base plate 1, and the position of the spiral coil portion 130 is increased. The movable arm 132 that is continuous with the small-diameter coil crosses the outer peripheral coil portion and the base plate 1 from the minimum-diameter coil in the direction toward the upper periphery of the mounting shaft 21. The end of the movable arm 132 is pressed with a predetermined elasticity against the inner side of the flange 21a of the mounting shaft 21 that floats from the back surface of the base plate 1.
The movable arm 132 urges the plate cam 2 in the downward direction by contacting the upper and outer peripheral portions of the mounting shaft 21 with the elastic force in the downward direction, and the end of the movable side arm 132 is U-shaped. , L-shaped or J-shaped terminal bent portion 13 b (FIG. 7) is formed, and this terminal bent portion 13 b is hooked on the peripheral edge portion of the flange 21 a of the mounting shaft 21.
The spiral coil portion 130 of the torsion spring 13 can also be implemented in a plane winding form as illustrated in FIG. 10, but in this embodiment, as shown in FIG. It is comprised so that a conical coil shape may be exhibited.

As described above, the position of the maximum diameter portion of the spiral coil portion 130 in the torsion spring 13 or the vicinity thereof is pressed against the back side of the base plate 1 by the pressing piece 14, and the end portion of the fixed side arm 131 is moved to the base plate 1. When the movable side arm 132 is arranged so as to cross between the coil outside the smallest diameter coil and the base plate 1 toward the upper outer periphery of the mounting shaft 21, the movable side arm 132 is locked or fixed so as not to move. The repulsive force in the direction of arrow A in FIG.
This repulsive force acts in the direction in which the tip of the movable arm 132 is lifted from the back surface of the base plate 1, so that the plate cam 2 is pressed against the front side of the base plate 1, and the mounting shaft 21, plate cam 2 and base plate 1 are pressed. The rattling and the like are absorbed.
By making the spiral coil portion 130 of the torsion spring 13 into a gentle conical coil shape toward the back surface of the base plate 1 as described above, the above-mentioned effect is further prominent and a three-dimensional spring operation is achieved. It is easy to release stress.

  A U-shaped, L-shaped or J-shaped terminal bending portion 13 b (FIG. 7) is formed at the end of the movable arm 132, and this terminal bending portion 13 b is connected to the peripheral portion of the flange 21 a of the mounting shaft 21. By hooking, even when the apparent length of the movable arm 132 is relatively short in the state of the solid line in FIG. 7, the movable arm 132 may be detached from the mounting shaft 21 while the mounting shaft 21 is slid to the upper limit. As a result, the operating stroke of the tip of the movable arm 132 can be reduced as a result.

In this embodiment, the torsion spring 13 is configured such that the coil mutual spacing of the spiral coil portion 130 is more than the portion closer to the movable arm 132 before the plate cam 2 is attached to the attachment shaft 21 and the base plate 1. It is large in the portion near the fixed arm 131 (FIG. 12).
However, the distance between the coils of the spiral coil portion 130 is made more uniform by the fine movement of the spiral coil portion 130 due to the mounting of the plate cam 2 to the mounting shaft 21 and the base plate 1 (FIG. 13). It has become.
With this configuration, stress is easily dispersed and damage and other spring wear are prevented.

As shown in FIG. 14, a roller 210 made of a low friction member is attached to a contact portion of the mounting shaft 21 with the guide slit 11. The end portion of the cola 210 on the flange 21a side is in a state of being embedded or submerged in the flange 21a of the mounting shaft 21.
A roller 120 made of a low friction member is also attached to the outer periphery of the guide pin 12.
These rollers 210 and 120 prevent wear of their own and sliding portions with them, and the operating torque is reduced by reducing friction. Further, when the end portion is embedded in the flange 21a like the roller 210 of the mounting shaft 21, the roller 210 is reinforced and more stable.
The rollers 210 and 120 are preferably formed of a low friction resin.

Other Embodiments FIG. 15 shows a modified form of the attachment structure of the roller 210 to the attachment shaft 21, and the inner peripheral surface of the roller 210 attached so that one end is embedded in the flange 21 a of the attachment shaft 21. A ring-shaped groove 211 is formed on the outer peripheral portion of the mounting shaft 21 in contact with the roller 210 toward the side.
The compression of the roller 210 can be released by the ring-shaped groove 211.
FIG. 16 shows the outer periphery of the end portion of the roller 210 exposed in the circumferential direction, for example, to reduce the friction between the movable arm 132 of the torsion spring 13 and the mounting shaft 21 in FIG.
FIG. 17 shows a mounting structure of the roller 210 in FIG. 16, in which a polyslider 212 is interposed between the base plate 1 and the plate cam 2 in the vicinity of the roller 210, and the sliding portion grease at the mounting position of the roller 210. It is made less and the waterproofness of the part is improved.

FIG. 18 shows a modification of the mounting state of the roller 120 with respect to the guide pin 12. One end of the roller 120 is embedded in the flange 12a of the guide pin 12 so as to be in contact with the inner peripheral surface of the roller 120. A ring-shaped groove 121 is formed on the outer peripheral surface of the guide pin 12.
The effect of the ring-shaped groove 121 is the same as that of the ring-shaped groove 211 shown in FIG.
In FIG. 19, the roller 120 is attached in a state of contacting the outer periphery of the guide pin 12 and the inside of the flange 12 a, while a poly slider 122 is interposed between the base plate 1 and the plate cam 2 in the vicinity of the sliding portion with the guide pin 12. It is intended to reduce the grease and improve waterproofness of the part.

20 is a partially enlarged cross-sectional view of the outer peripheral portion of the plate cam 2 punched out by pressing, and FIG. 21 is a partially enlarged cross-sectional view of the state where the outer peripheral portion of the plate cam 2 is polished.
As shown in FIG. 20, the plate cam 2 is punched by a punching press so that the fracture surface in the plate thickness direction is 1/2 or less of the plate thickness t1, as shown in FIG. This is finished by barrel polishing as shown in FIG.
By processing the plate cam 2 in this way, the surface accuracy of the outer peripheral surface of the plate cam 2 is improved.

FIG. 22 is a partially enlarged cross-sectional view of the inner peripheral portion of the guide slit 11 of the base plate 1 punched out by pressing, and FIG. 23 is a partially enlarged cross-sectional view of the state where the inner peripheral surface of the guide slit of the base plate 1 is polished. .
As shown in FIG. 22, the base plate 1 is punched by a punching press so that the fracture surface in the plate thickness direction becomes 1/2 or less of the plate thickness t2, as shown in FIG. Is finished by barrel polishing as shown in FIG.
By processing the base plate 1 in this way, the surface accuracy of the inner peripheral surface is improved.

It is a partial exploded perspective view of a slide rotation attachment unit concerning a 1st embodiment. FIG. 2 is a schematic perspective view of a folding mobile phone in which the slide rotation mounting unit of FIG. 1 is used. It is a front view of the slide rotation mounting unit of the same embodiment when the movable housing | casing of a folding mobile telephone is a reference | standard attitude | position. FIG. 4 is a schematic front view of the slide rotation mounting unit in a state where the plate cam is rotated 90 degrees clockwise from the state of FIG. 3. FIG. 5 is a schematic plan view of the folding mobile phone when the slide rotation mounting unit is changed to the state of FIG. 4. It is an expanded sectional view of the internal thread boss formation part of a plate cam. It is a rear view of the slide rotation attachment unit of 1st Embodiment. It is an expanded sectional view of the female screw boss formation part of a base board. It is a partial expanded sectional view of the torsion spring in the slide rotation unit of a 1st embodiment. It is a partial expanded sectional view which shows the deformation | transformation form of a torsion spring. It is a partial expanded sectional view which follows the arrow AA of FIG. It is an enlarged plan view which shows the state before attachment of a torsion spring. It is an enlarged plan view which shows the state after attachment of a torsion spring. It is an expanded sectional view which follows the arrow BB of FIG. It is a partial expanded sectional view which shows the deformation | transformation form of the attachment structure of an attachment shaft. It is a partial expanded sectional view which shows the other modification of the attachment structure of an attachment shaft. It is a partial expanded sectional view which shows the other modification of the attachment structure of an attachment shaft. It is a partial expanded sectional view which shows the deformation | transformation form of the attachment structure of a guide pin. It is a partial expanded sectional view which shows the other modification of the attachment structure of a guide pin. It is a partial expanded sectional view of the outer peripheral part of the plate cam punched out by the press. It is a partial expanded sectional view of the state where the peripheral part of the plate cam was polished and finished. It is the elements on larger scale of the inner peripheral part of the guide slit of the base board punched out by the press. It is a partial expanded sectional view of the state where the inner peripheral surface of the guide slit of the base plate was polished and finished.

Explanation of symbols

a slide rotation mounting unit 1 base plates 1a and 2a machine screws 10 and 20 female screw boss 11 guide slit 12 guide pin 13 torsion springs 13a and 13b end bending portion 13c intermediate bending portion 130 spiral coil portion 131 fixed side arm 132 movable side arm 2 Plate cam 21 Mounting shaft 21a Flange 22 Mounting holes 23, 230, 231, 232 Recess 3 Holding base 31, 41 Screw guide 4 Movable housing 5 Base housing 6 Hinge

Claims (13)

A slide rotation mounting unit for mounting the movable housing so as to rotate while sliding at least partially over the holding base,
A base plate that is attached to the holding base by screwing on the opposing surface of the holding base and the movable housing, and that is attached to the movable housing by screwing, and is located vertically with respect to the base plate. A plate cam attached so as to rotate 90 degrees to the left and right by cam control while sliding a fixed amount,
Female screw bosses for screwing are respectively formed on the plate cam and the base plate by fleshing ,
The base plate is provided with a guide slit along a vertical direction in a reference posture which is a basic use state of the movable housing, and a guide pin with which a cam portion of the plate cam slides on an extension of a lower end portion of the guide slit,
The plate cam is provided with an attachment shaft that is slidably and rotatably engaged with the guide slit in a retaining state,
The cam portion of the plate cam that is in sliding contact with the guide pin is formed with a recess for guiding the guide pin when the movable housing is in the reference posture and rotated 90 degrees left and right from the reference posture. And
The plate cam is constantly urged downward by a torsion spring attached to the side of the base plate facing the holding base,
The torsion spring includes a spiral coil portion, a stationary arm whose end is locked or fixed to the base plate and continuous with the outer peripheral coil of the spiral coil portion, and the mounting shaft in contact with the plate cam. A movable side arm that is urged downward and is continuous with the inner peripheral coil of the spiral coil portion, and the position of the outer peripheral coil in the vicinity of the maximum diameter portion is determined by the presser piece cut and raised to the base plate. The inner peripheral coil where the movable side arm is held is positioned closer to the base plate than the other coil portions, and the end of the movable side arm of the mounting shaft floats from the surface of the base plate. Pressed against the inside of the flange with a predetermined elasticity,
A slide rotation mounting unit characterized by that. A female screw boss formed on one side or both sides of the plate cam and the base plate by forming a ring-shaped recess around the position where the female screw boss is formed, toward the position where the female screw boss is formed. The slide rotation mounting unit according to claim 1, wherein the thickness and height are increased. Each female screw boss of the said plate cam is formed in the state which protrudes in the said movable housing | casing side, Each female screw boss of the said base plate is formed in the state which protrudes in the said holding | maintenance base side. Slide rotation mounting unit. The slide rotation mounting unit according to any one of claims 1 to 3, wherein the spiral coil portion of the torsion spring is formed in a gentle conical coil shape toward the base plate. A terminal bent portion bent in a U shape, an L shape or a J shape is formed at the end of the movable arm in the torsion spring, and the terminal bent portion is an outer peripheral edge of the flange of the mounting shaft. The slide rotation mounting unit according to any one of claims 1 to 4, wherein the slide rotation mounting unit is hooked on the slide rotation unit. The fixed side arm of the torsion spring has an intermediate bent portion bent in a substantially U shape in plan view so as to be recessed toward the spiral coil portion, and from the inside of the intermediate bent portion to the spiral coil portion. The slide rotation mounting unit according to any one of claims 1 to 5 , wherein at least one portion in between is in contact with a boss-shaped protrusion formed integrally with the base plate. In the torsion spring, before the plate cam is attached to the mounting shaft and the base plate, the coil mutual spacing of the spiral coil portion is larger in the portion closer to the fixed side than in the portion closer to the movable side, 7. The coil according to any one of claims 1 to 6, wherein the coil mutual spacing of the spiral coil portion is made more uniform by the fine movement of the spiral coil portion due to the attachment of the plate cam to the base plate. The slide rotation mounting unit described. The slide rotation attachment according to any one of claims 1 to 7, wherein a roller made of a low friction member is provided at a contact portion between the attachment shaft and the guide slit and a contact portion between the guide pin and the cam portion. unit. The slide rotation mounting unit according to claim 8 , wherein the roller is made of a low friction resin, and a ring-shaped groove is formed in a contact shaft portion with the inner surface of the roller. Wherein one end portion of the roller mounting shaft embedded to the inside of the flange of the mounting shaft, embedded one end portion of the roller of the guide pin to the inside of the flange formed on the head of the guide pin, claim 8 or 9 The slide rotation mounting unit according to any one of the above. The slide rotation mounting unit according to any one of claims 8 to 10 , wherein a poly-slider is interposed between the plate cam and the base plate around the mounting shaft and the guide pin. The base plate of the guide slit or / and the plate cam claims 8 to 11 fracture surfaces in the thickness direction is finished by barrel polishing punching, the punching surface by stamping press so that the thickness of 1/2 or less The slide rotation mounting unit according to any one of the above. A slide rotation mounting unit according to any one of claims 1 to 12 , wherein the holding base is attached to a transmission side housing having an input portion by a hinge, and the movable housing is an LCD housing. A featured mobile phone.

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