JP2009140037A - Heart-cam mechanism and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heart-cam mechanism that is advantageous for easing impact generated in operation, and to provide an electronic apparatus. <P>SOLUTION: In a USB memory 10, a cap 26 moves on a mid body 22, and the cap 26 is held at a storage position for storing a memory side USB connector 12, and a working position for exposing the memory side USB connector 12, by the heart-cam mechanism 28. The heart-cam mechanism 28 includes a heart-cam 36, elastic member 38, and spring 40. When the cap 26 is moved from a third position toward the storage position by means of biasing force of a spring 40, a cam pin 42 is brought into contact with a first deceleration unit 72 of a third cam unit 68, and the elastic member 38 is elastically deformed, thereby reducing the speed toward the storage position of the cap 26. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a heart cam mechanism and an electronic device.

A USB memory is provided as an auxiliary storage device used by being mounted on a host such as a personal computer.
The USB memory has a memory-side USB connector, and is used by connecting the memory-side USB connector to a host-side USB connector (USB port) provided in the host.
In many cases, the USB memory includes a main body provided with a memory-side USB connector and a dustproof cap that is detachably attached to the memory-side USB connector.
However, since the cap removed when the USB memory is attached to the host tends to be lost, the cap is slidable and non-removable with respect to the main body, and the cap protrudes to cover the memory side USB connector. There is provided one that is selectively positioned at a position and an exposed position where the cap is retracted to expose the memory-side USB connector.
As a mechanism for selectively positioning such a cap between the storage position and the exposure position, a conventionally known heart cam mechanism may be used (see Patent Document 1).
JP 2000-207497 A

However, in the conventional heart cam mechanism, the cap is urged toward the storage position using an urging force such as a spring, and when the cap is positioned at the exposed position, the spring is accumulated and a large urging force is applied to the cap. It will be in the state where it took.
Therefore, when moving from the exposure position to the storage position, the cap moves vigorously due to the urging force of the spring, and a large impact or vibration occurs due to the collision between the cap and the main body.
Such an impact or vibration gives stress to the memory-side USB connector or electronic component mounted on the printed wiring board by soldering, and there is a concern about deterioration or breakage of the component or the soldered portion.
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a heart cam mechanism and an electronic apparatus that are advantageous in mitigating the impact generated during operation.

In order to achieve the above-mentioned object, the present invention provides a second member coupled to the first member so as to be linearly movable, a heart cam provided on the second member, and an elongated shape in the moving direction, and its longitudinal direction. And an elastically deformable elastic member provided with a cam pin that engages with the heart cam at the other end in the longitudinal direction thereof, and the cam groove of the heart cam is parallel to the moving direction. A linear cam portion that extends in a direction to be bent, a curved first cam portion that extends from the tip of the linear cam portion, a curved second cam portion that follows the first cam portion, and a second cam A curved third cam portion connected to the distal end of the linear cam portion following the portion, and the second member is in a state where the cam pin is located at the proximal end of the linear cam portion separated from the distal end. In the first position, the cam pin is in the second cam portion. When the second member is positioned, the second member becomes a second position away from the first position in the moving direction, and the cam pin is located at the end of the first cam portion near the second cam portion and the second position. In a state where the second member is located at the end of the third cam portion close to the cam portion, the second member becomes a third position displaced in a direction away from the first position rather than the second position. A heart cam mechanism in which a spring urging in the direction of being located at the first position is provided across the first member and the second member, and the tip of the linear cam portion is connected to the tip via the cam pin A first reduction portion is provided that elastically deforms the elastic member to reduce the speed of the second member from the third position toward the first position by the biasing force of the spring.
Further, the present invention is an electronic apparatus comprising a first member, a second member coupled to the first member so as to be linearly movable, and a heart cam mechanism provided across the first member and the second member. The heart cam mechanism has a heart cam provided on the second member and an elongated shape in the moving direction, and one end in the longitudinal direction is attached to the first member, and the other end in the longitudinal direction is attached to the heart cam. An elastically deformable elastic member provided with an engaging cam pin, wherein the cam groove of the heart cam extends from a linear cam portion extending in a direction parallel to the moving direction, and a tip of the linear cam portion. An extended curved first cam portion, a curved second cam portion following the first cam portion, and a curved third cam portion connected to the tip of the linear cam portion following the second cam portion. The cam pin has the tip and The second member is in the first position when it is positioned at the base end of the linear cam portion, and the second member is at the first position when the cam pin is positioned at the second cam portion. The cam pin is located at the end of the first cam portion near the second cam portion and the end of the third cam portion near the second cam portion. In this state, the second member becomes a third position displaced in a direction away from the first position from the second position, and the spring biases the two members in the direction in which the second member is located in the first position. Is provided across the first member and the second member, and the elastic member is elastically deformed via the cam pin at the tip of the linear cam portion, and the second member of the second member is biased by the urging force of the spring. From position 3 to the first position Wherein the first reduction unit for reducing the speed is provided.

According to the present invention, the heart cam that moves the second member between the first position and the third position with respect to the first member reduces the speed of the second member toward the first position. Since the speed reduction part is provided, the impact generated by the collision between the first member and the second member can be reduced.
Therefore, for example, when an electronic component is incorporated in the first member, the electronic component is not stressed, the deterioration and damage of the electronic component can be prevented, and durability and reliability can be improved. It will be advantageous.
In addition, since the speed of the second member is reduced by elastically deforming the elastic member that constitutes the heart cam mechanism, the speed can be reduced without providing a dedicated member for speed reduction, and therefore without increasing the number of parts. It is possible to prevent deterioration and breakage of electronic components, which is advantageous in improving durability and reliability.

Next, an embodiment in which the heart cam mechanism of the present invention is applied to an electronic device will be described with reference to the drawings.
In the present embodiment, the electronic device is a USB memory.
FIG. 1A is a perspective view of the USB memory 10 showing a connector housing state, FIG. 1B is a perspective view showing a protruding state of the connector, FIGS. 2 and 3 are exploded perspective views of the USB memory 10, and FIG. 3 is a block diagram showing a control system of the memory 10. FIG.
First, the control system of the USB memory 10 will be described with reference to FIG.
The USB memory 10 is an auxiliary storage device used by being connected to a USB connector (USB port) of a host such as a personal computer.
The USB memory 10 includes a printed wiring board 20, and the printed wiring board 20 is provided with a memory-side USB connector 12, a USB interface unit 14, a memory control unit 16, a memory unit 18, and the like.
The memory side USB connector 12 is detachably connected to the host side USB connector 4 provided in the host 2.
The USB interface unit 14 recognizes that the USB memory-side connector 12 is connected to the host-side USB connector 4, and controls data communication between the host 2 and the USB memory 10 based on the USB protocol. .
The memory control unit 16 writes data supplied from the host 2 via the USB interface unit 14 to the memory 18 and supplies data read from the memory 18 to the host 2 via the USB interface unit 14.
The memory unit 18 is composed of a non-volatile memory element that can be accessed randomly, and a flash memory is used as such a memory element.
The USB interface unit 14, the memory control unit 16, and the memory unit 18 are configured to include various electronic components such as passive components and switches that constitute LSIs and peripheral circuits, respectively.
The printed wiring board 20 has an elongated rectangular plate shape as shown in FIGS. 2 and 3, the memory-side USB connector 12 is mounted by soldering at one end in the longitudinal direction, and both sides of the printed wiring board 20 in the thickness direction. The LSI and the electronic components (not shown) constituting the USB interface unit 14, the memory control unit 16, and the memory unit 18 are mounted by soldering.
In this embodiment, the USB interface unit 14 and the memory control unit 16 are configured by one LSI and two memory units 18 are provided. However, the USB interface unit 14, the memory control unit 16, and the memory unit are illustrated. The configuration and number of 18 are arbitrary.

As shown in FIGS. 2 and 3, the USB memory 10 is slidable (linearly movable) to the mid body 22 that houses the printed circuit board 20, the end body 24 that is attached to the mid body 22, and the mid body 22. And a heart cam mechanism 28 provided between the mid body 22 and the cap 26.
The cap 26 moves on the mid body 22, and the cap 26 exposes the memory-side USB connector 12 by the heart cam mechanism 28 and the memory-side USB connector 12. It is held at the use position (second position in the claims).
The heart cam mechanism 28 includes a heart cam 36 (FIG. 13), an elastic member 38, and a spring 40.
In the present embodiment, the mid body 22 constitutes the first member of the claims, and the cap 26 constitutes the second member of the claims.

5 is an exploded perspective view of the mid body 22, the end body 24, and the elastic member 38, FIG. 6 is an explanatory view of assembling the elastic member 38 to the mid body 22, and FIG. 7 is a plan view of the elastic member 38 assembled to the mid body 22. 8 is a perspective view in which the elastic member 38 is assembled to the mid body 22, FIG. 9A is a plan view of the accommodating portion 44 of the mid body 22, and FIG. 8B is a sectional view taken along line XX of FIG. ) Is a cross-sectional view taken along line YY of (A), FIG. 10 (A) is a bottom view of mid body 22, and (B) is a cross-sectional view taken along line BB of (A).
As shown in FIGS. 5 and 10, the mid body 22 has an elongated cylindrical shape with a rectangular cross section, and has a vertical thickness, a horizontal width larger than the thickness, and a length larger than the width. And both ends in the length direction are open.
The mid body 22 has an upper wall 30 and a lower wall 32 located on both sides in the thickness direction, and left and right side walls 34 that connect the left and right sides of the upper wall 30 and the lower wall 32.
The printed circuit board 20 is accommodated and held in a rectangular space surrounded by the upper wall 30, the lower wall 32, and the left and right side walls 34 of the mid body 22 in a state in which the longitudinal direction of the printed board 20 coincides with the longitudinal direction of the mid body 22. In this state, most of the memory-side USB connector 12 is exposed from one opening of the mid body 22.
The end body 24 has a cross-sectional shape that is slightly larger than the cross-sectional shape of the mid body 22, and as shown in FIGS. 5 and 7, the end body 24 extends in the longitudinal direction of the mid body 22 located on the opposite side of the memory-side USB connector 12. It is attached to the end and closes the opening of the end.

As shown in FIGS. 5 and 6, a housing 44 for the elastic member 38 constituting the heart cam mechanism 28 is provided on the upper wall 30 of the mid body 22.
As shown in FIGS. 7 and 8, the accommodating portion 44 includes a concave portion 46 that allows elastic deformation of the elastic member 38, and a U-shaped wall portion for attaching the elastic member 38 provided at the end of the concave portion 46. 50.
As shown in FIG. 9A, the U-shaped wall portion 50 bulges from the bottom surface of the recess 46, and connects the two sides 5002 and 5004 facing each other and the end portions of the two sides 5002 and 5004. And a curved side 5006.
Two sides 5002 and 5004 facing each other extend in a direction parallel to the direction connecting the storage position and the use position.
As shown in FIG. 9B, a holding groove 52 in which the elastic member 38 is fitted and held is formed on one side 5002 of the two sides.
Further, as shown in FIGS. 9A and 9C, a convex portion 54 that sandwiches the elastic member 38 in cooperation with the curved side 5006 is formed on the side wall of the concave portion 46 facing the curved side 5006. .
Further, as shown in FIG. 9B, a concave portion 56 with which a part of the side surface of the elastic member 38 is engaged is provided at the end portion of the remaining one side 5004 of the two sides.
As shown in FIGS. 6 and 10, linear grooves 57 extending in parallel with the longitudinal direction of the mid body 22 are formed in the upper wall 30 and the lower wall 32 of the mid body 22.

The elastic member 38 is made of a spring steel wire.
As shown in FIG. 6, the elastic member 38 has a main body portion 38A that extends linearly, and a cam pin 42 that engages with the heart cam 36 is provided at one end in the longitudinal direction of the main body portion 38A.
The other end in the longitudinal direction of the main body portion 38 </ b> A serves as an attachment portion 38 </ b> B attached to the U-shaped wall portion 50.
As shown in FIGS. 9A, 9 </ b> B, and 9 </ b> C, the attachment portion 38 </ b> B includes a first straight portion 3802 that is held on one side 5002 of two sides 5002 and 5004 that face each other, It has a curved portion 3804 applied to the curved side 5006 and a second straight portion 3806 engaged with the other one side 5004 of the two sides 5002 and 5004 facing each other. The straight portion 3806 is linearly continuous.
In the elastic member 38, the first straight portion 3802 is held in the holding groove 52 as shown in FIG. 9B, and the middle portion of the bending portion 3804 is shown in FIG. 9C as a curved side 5006. As shown in FIG. 9B, the second linear part 3806 is engaged with the concave part 56 and disposed in the accommodating part 44. In this state, the elastic member excluding the cam pin 42 The portion 38 is located inside the mid body 22 with respect to the surface of the upper wall 30, and only the cam pin 42 projects upward from the surface of the upper wall 30.

11 is a perspective view in which the cap 26 is turned upside down, FIG. 12A is a sectional view taken along line AA in FIG. 11, FIG. 11B is a sectional view taken along line BB in FIG. FIG. 13 is an enlarged view, FIG. 13 is a perspective view showing an engaged state of the heart cam 36 and the cam pin 42, and FIG. 14 is a cross-sectional view of the cap 26 in which the mid body 22 is accommodated.
As shown in FIGS. 11 and 14, the cap 26 has an elongated cylindrical shape having a rectangular cross section with a size that allows the midbody 22 to be accommodated therein, and has a vertical thickness and a horizontal dimension that is larger than the thickness. And a length having a dimension larger than the width, and both ends in the length direction are open.
As shown in FIGS. 2 and 3, the mid body 22 is inserted into the cap 26, and the spring 40 constituting the heart cam mechanism 28 is a coil having a size for winding the printed wiring board 20 inside the mid body 22. It is formed in a shape. One end of the spring 40 is attached to the printed wiring board 20 or the mid body 22, and the other end of the spring 40 is attached to the inner surface of the cap 26. The spring 40 receives the cap 26 in the storage position (FIG. 1B). ) Is always on.
As shown in FIG. 14, the cap 26 that faces the groove portion 57 formed in the upper wall 30 and the lower wall 32 (FIG. 10A) of the mid body 22 in a state where the mid body 22 is accommodated in the cap 26. As shown in FIG. 12B, convex portions 27 that are slidably engaged with the two groove portions 57 are formed on the inner surface.
The first position of the cap 26 is the cap 26 in the direction from the use position (second position) to the storage position (first position) (or in the direction from the third position described later to the first position). Is the limit position where the cap 26 can move, and the range of movement of the cap 26 in the direction from the use position (second position) to the storage position (first position) across the cap 26 and the midbody 22 is set to the storage position (first position). 1) is provided. The stopper mechanism 80 is composed of a convex portion 27 and a groove portion 57.

The heart cam 36 is formed on the inner surface of the cap 26 as shown in FIGS. The inner surface is a surface facing the upper wall 30 of the mid body 22 in a state where the mid body 22 is accommodated in the cap 26.
As shown in FIG. 15B, the cam groove 60 of the heart cam 36 includes a linear cam portion 62 extending in a direction parallel to the direction connecting the storage position and the storage position, and a tip of the linear cam portion 62. A curved first cam portion 64 that extends, a curved second cam portion 66 that follows the first cam portion 64, and a curved second cam portion that continues to the tip of the linear cam portion 62 following the second cam portion 66. Three cam portions 68 are provided.
As shown in FIG. 16A, the cap 26 is in the storage position (first position) in a state where the cam pin 42 is positioned at the base end 70 of the linear cam portion 62 separated from the tip.
Further, as shown in FIG. 20, the cap 26 is in the use position (second position) when the cam pin 42 is positioned in the second cam portion 66 (specifically, in the recess 66A (FIG. 16A) of the second cam portion 66). Position).
Further, the cap 26 is in the use position (second position) with the cam pin 42 positioned at the end of the first cam portion 64 near the second cam portion 66 and the end of the third cam portion 68 near the second cam portion 66. The third position displaced in a direction away from the storage position (first position).

In a state where the cam pin 42 is positioned at the proximal end 70 of the linear cam portion 62, the second linear portion 3806 and the main body portion 38A extend linearly without bending as indicated by reference numeral P0 in FIG.
The first cam portion 64 and the third cam portion 68 are located at opposite positions across the extension line of the main body portion 38 </ b> A extending linearly, and the cam pin 42 is engaged with the first cam portion 64. In the state and the state in which the cam pin 42 is engaged with the third cam portion 68, the direction in which the main body portion 38A bends is opposite. More specifically, the first cam portion 64 and the third cam portion 68 are located at positions opposite to each other across the extension line of the linear cam portion 62, and the first cam portion 64 with respect to the extension line. The amount of bending is larger than the amount of bending of the third cam portion 68 with respect to the extension line.
That is, in a state where the cam pin 42 is positioned on the first cam portion 64, the location of the curved portion 3804 (first location in the claims) sandwiched between the convex portion 54 and the curved side 5006 of the wall portion 50 is defined. The second linear portion 3806 and the main body portion 38A are bent at the center as indicated by reference numeral P1 in FIG. 9A, and the cam pin 42 contacts the side surface of the cam groove of the first cam portion 64 near the third cam portion 68.
In the state where the cam pin 42 is positioned at the third cam portion 68, the second straight portion 3806 is brought into contact with the other side 5004 by engaging with the concave portion 56, and the second straight portion 3806, the main body portion 38 </ b> A, Main body 38A is bent in a direction opposite to the direction of bending as shown by reference numeral P2 in FIG. The cam pin 42 comes into contact with the side surface of the cam groove of the third cam portion 68 near the first cam portion 64.
Therefore, the end portion 56A (FIG. 9A) of the concave portion 56 serving as a fulcrum when the second linear portion 3806 and the main body portion 38A bend is formed with the convex portion 54 serving as a fulcrum when the main body portion 38A is bent. This is a location that deviates toward the cam pin 42 from the location where the curved side 5006 of the wall 50 faces.
In the present embodiment, when the cam pin 42 is positioned on the first cam portion 64 and the amount of bending is large, the main body portion 38A and the second linear portion 3806 are bent, and the cam pin 42 is positioned on the third cam portion 68. When the bending amount is small, only the main body portion 38A bends, that is, the location of the curved portion 3804 (the first location in the claims) is the location at the boundary between the second straight portion 3806 and the main body portion 38A. When the deflection is larger than the second portion of the claims, the elastic member 38 is bent at a long portion and the deflection is small. Is configured to bend a short portion of the elastic member 38 and to change the fulcrum when the elastic member 38 is bent.

Then, as shown in FIG. 15B, the elastic member 38 is elastically deformed to the third cam portion 68 via the cam pin 42, and the speed toward the storage position of the cap 26 by the urging force of the spring 40 is reduced. One deceleration part 72 is provided.
As shown in FIG. 14 (B), the cam groove 60 constituting the first reduction gear portion 72 is 45 degrees with respect to the direction connecting the use position (or the third position) and the storage position (first position). It extends with an inclination of 90 degrees or less (indicated by an angle θ in FIG. 14B).
Furthermore, in the present embodiment, the elastic member 38 is elastically deformed via the cam pin 42 to the first speed reducing portion 72 located near the base end 70, and the cap 26 is accommodated by the elastic force of the spring 40 (first position). The 2nd deceleration part 62 which decelerates the speed which goes to is connected.

Next, the operation of the heart cam mechanism 28 will be described.
FIG. 15A is an explanatory view showing the trajectory of the cam pin 42 on the heart cam 36 when the cap 26 moves from the storage position (first position) to the use position (second position), and FIG. FIG. 6 is an explanatory diagram showing a locus of a cam pin 42 on the heart cam 36 when moving from a use position (second position) to a storage position (first position).
FIG. 16 is an operation explanatory view of the heart cam mechanism 28 showing the storage position (first position) of the cap 26, and FIG. 17 shows a state where the cam pin 42 is moved from the base end 70 toward the use position (second position). 18 is an operation explanatory view of the heart cam mechanism 28, FIG. 18 is an operation explanatory view of the heart cam mechanism 28 showing a state in which the cam pin 42 is positioned on the first cam portion 64, and FIG. 19 is a heart cam showing a state in which the cam pin is positioned on the second cam portion 66. FIG. 10 is an operation explanatory diagram of the mechanism 28.
20 is an operation explanatory view of the heart cam mechanism 28 showing the use position (second position) of the cap 26, and FIG. 21 is an operation explanatory view of the heart cam mechanism 28 showing a state where the cam pin 42 has moved toward the third position. FIG. 22 is an operation explanatory view of the heart cam mechanism 28 showing a state in which the cam pin 42 is positioned on the third cam portion 68, and FIG. 23 is a heart cam mechanism showing a state in which the cam pin 42 is in contact with the first reduction portion 72 of the third cam portion 68. FIG. 24 is an operation explanatory view of the heart cam mechanism 28 showing a state in which the cam pin 42 is changed from the third cam portion 68 to the linear cam portion 62, and FIG. 25 is a view in which the cam pin 42 contacts the second speed reducing portion 74. FIG. 26 is an operation explanatory view of the heart cam mechanism 28 showing the storage position (first position) of the cap 26. FIG.

First, an operation when the cap 26 in the storage position (first position) covering the memory-side USB connector 12 is moved to the use position (second position) where the memory-side USB connector 12 is exposed will be described.
As shown in FIG. 16, the cam pin 42 is located at the base end 70 of the linear cam portion 62 of the heart cam 36 when the cap 26 is stored.
When the cap 26 is gripped with a finger and moved against the biasing force of the spring 40 from the storage position toward the use position, the cam pin 42 is moved from the linear cam portion 62 to the first cam portion as shown in FIGS. 64, the second linear portion 3806 of the elastic member 38 and the main body portion 38A are bent.
Further, when the cap 26 is moved in the exposure direction as shown in FIG. 19, the cam pin 42 is positioned at the end of the first cam portion 64 near the second cam portion 66, and the cap 26 is in the third position.
Here, when the finger is released from the cap 26, the cap 22 is moved from the third position toward the use position (second position) by the biasing force of the spring 40, and the cam pin 42 is moved to the first position by the elastic force of the elastic member 38. The cap 26 moves to the second cam portion 66 from the first cam portion 64 and the cap pin 42 engages with the second cam portion 66 (recess 66A) as shown in FIG. The memory side USB connector 18 is exposed from the tip of the cap 26.
In this state, the USB memory 10 is used by attaching the memory-side USB connector 18 to the host-side USB connector 4 of the host 2.

Next, an operation when the cap 26 at the use position (second position) where the memory side USB connector 12 is exposed is moved to the storage position (first position) covering the memory side USB connector 12 will be described.
As shown in FIG. 20, in the use position (second position) of the cap 26, the cam pin 42 is engaged with the second cam portion 66 (recess 66A) of the heart cam 36. In this state, the memory-side USB connector 18 is It is assumed that it is attached to the host side USB connector 4 of the host 2.
Here, the cap 26 is grasped and moved in a direction in which the memory-side USB connector 18 is pulled out from the host-side USB connector 4 of the host 2.
Then, as shown in FIG. 21, the cam pin 42 is moved from the second cam portion 66 to the end portion of the third cam portion 68 near the second cam portion 66 by the elastic force of the elastic member 38, and the cap 26 is in the third position. Stop at the position.
Further, when the cap 26 stopped at the third position is moved, the cam pin 42 comes into contact with the outer side surface 6820 (see FIG. 21) of the cam groove of the third cam portion 68. Is pulled out from the host-side USB connector 4.
When the memory-side USB connector 18 is pulled out from the host-side USB connector 4, the cap 26 is moved from the third position toward the storage position (first position) by the biasing force of the spring 40 as shown in FIG. The cam pin 42 moves from the third cam portion 68 toward the linear cam portion 62. When the cam pin 42 reaches the linear cam portion 62, as shown in FIG. 23, the cam pin 42 comes into contact with the first speed reducing portion 72 of the linear cam portion 62, and the elastic member 38 is elastically deformed, thereby causing the cap 26 to move. The speed toward the storage position is reduced.
The cap 26 is moved toward the storage position (first position) by the urging force of the spring 40, and the cam pin 42 moves toward the base end 70 in the linear cam portion 62 as shown in FIG. To do.
As the cap 26 further moves, as shown in FIG. 25, the cam pin 42 comes into contact with the second speed reducing portion 74, and the elastic member 38 is elastically deformed, so that the speed toward the storage position of the cap 26 is reduced. Moves toward the proximal end 70.
As shown in FIG. 26, the cap 26 is held at the storage position (first position) by the stopper mechanism 80, the cam pin 42 is positioned at the base end 70, and the memory-side USB connector 12 is covered with the cap 26.
As a result, the USB memory 10 is in a state suitable for carrying.

As described above, according to the present embodiment, the cap 26 (second member) with respect to the mid body 22 (first member) is placed in the storage position (first position) and the use position (second position). Since the first reduction part 72 that reduces the speed of the cap 26 toward the storage position (first position) of the cap 26 is provided in the heart cam 36 that is moved in between, the impact generated by the collision between the cap 26 and the mid body 22 Can be relaxed.
Therefore, when moving the cap 26 to the storage position (first position), the memory-side USB connector 12 and the electronic component mounted on the printed wiring board 20 by soldering are not stressed, and the electronic component or solder Deterioration and breakage of the attachment portion can be prevented, which is advantageous in improving durability and reliability.
In addition, since the speed of the cap 26 is reduced by elastically deforming the elastic member 38 constituting the heart cam mechanism 28, the speed can be reduced without providing a dedicated member for speed reduction, and therefore the number of parts is not increased at all. In addition, it is possible to prevent deterioration and breakage of electronic parts and soldered parts, which is advantageous in improving durability and reliability.

In the present embodiment, in addition to the first speed reducing portion 72, the elastic member 38 is elastically deformed by the heart cam 36 via the cam pin 42, and the storage position (first position) of the cap 26 by the urging force of the spring 40 is obtained. In order to improve durability and reliability, the second reduction portion 74 that reduces the speed toward the vehicle is provided, which is more advantageous in reducing the impact generated by the collision between the cap 26 and the mid body 22. More advantageous.
In the present embodiment, the portion where the cam pin 42 contacts the first reduction portion 72 and the portion where the cam pin 42 contacts the second reduction portion 74 are different portions on the outer peripheral surface of the cam pin 42. The places where the cam pins 42 are worn can be dispersed, which is advantageous in improving the durability of the cam pins 42.
Further, in the present embodiment, the elastic member 38 has the second straight portion centered on the location of the curved portion 3804 (the first location in the claims) when the cam pin 42 is positioned on the first cam portion 64. 3806 and the main body portion 38A are bent and the cam pin 42 is located at the third cam portion 68, the boundary between the second straight portion 3806 and the main body portion 38A (the second portion of the claims) is the center. The main body portion 38A bends in a direction opposite to the bending direction.
Accordingly, since the fulcrum at which the elastic member 38 bends is different between the state where the cam pin 42 is positioned at the first cam portion 64 and the state where the cam pin 42 is positioned at the third cam portion 68, the elastic member 38 has a fulcrum at the same location. As compared with the case where the elastic member 38 is bent, it is advantageous in enhancing the durability of the elastic member 38.
In the present embodiment, the amount of bending of the elastic member 38 when the cam pin 42 is positioned at the first cam portion 64 and the amount of bending of the elastic member 38 when the cam pin 42 is positioned at the third cam portion 68 are: The bending amount of the elastic member 38 when the cam pin 42 is positioned on the first cam portion 64 is set to be large, and the cam pin 42 is positioned at the first cam portion 64 in correspondence with this, and the cam pin 42 is third. In a state where the elastic member 38 is bent in a state where the elastic member 38 is bent in a state where the elastic member 38 is located, the flexible range of the elastic member 38 is ensured to be large. Is small, the flexible range of the elastic member 38 is ensured to be small, so that the elastic member 38 can have a minimum length.

In the present embodiment, the case where the heart cam mechanism 28 of the present invention is applied to the USB memory 10 has been described. However, the present invention is not limited to the USB memory 10 and can be applied to various electronic devices. .
For example, the present invention can be applied to an imaging apparatus including a housing in which a photographing optical system is incorporated and a lens barrier that is slidably provided on the housing and shields and exposes the photographing optical system.
In this case, the first member is a housing, the second member is a lens barrier, and the photographing optical system is in a shielding position covered with the lens barrier in a state where the lens barrier is positioned at the first position, and the lens barrier is It is configured to be a use position where the photographing optical system is exposed in the state where the second position is located.

(A) is a perspective view of the USB memory 10 showing the storage state of the connector, (B) is a perspective view showing the protruding state of the connector. 2 is an exploded perspective view of a USB memory 10. FIG. 2 is an exploded perspective view of a USB memory 10. FIG. 3 is a block diagram showing a control system of the USB memory 10. FIG. 3 is an exploded perspective view of a mid body 22, an end body 24, and an elastic member 38. FIG. FIG. 6 is an explanatory diagram of assembly of the elastic member 38 to the midbody 22. FIG. 3 is a plan view in which an elastic member 38 is assembled to the mid body 22. FIG. 5 is a perspective view in which an elastic member 38 is assembled to the mid body 22. (A) is the top view of the accommodating part 44 of the midbody 22, (B) is the XX sectional view of (A), (C) is the YY sectional view of (A). (A) is a bottom view of the mid body 22, and (B) is a cross-sectional view taken along the line BB of (A). It is the perspective view which reversed the cap 26 upside down. (A) is the sectional view on the AA line of FIG. 11, (B) is the sectional view on the BB line of (A), (C) is the principal part enlarged view of (A). FIG. 4 is a perspective view showing an engaged state of a heart cam 36 and a cam pin 42. It is sectional drawing of the cap 26 in which the midbody 22 was accommodated. (A) is explanatory drawing which shows the locus | trajectory of the cam pin 42 on the heart cam 36 when the cap 26 moves to a use position (2nd position) from an accommodation position (1st position), (B) is used by the cap 26. It is explanatory drawing which shows the locus | trajectory of the cam pin 42 on the heart cam 36 at the time of moving to a storage position (1st position) from a position (2nd position). FIG. 10 is an operation explanatory view of the heart cam mechanism showing a storage position (first position) of the cap. FIG. 10 is an operation explanatory diagram of the heart cam mechanism showing a state in which the cam pin is moved from the base end toward the use position (second position). FIG. 6 is an operation explanatory view of the heart cam mechanism showing a state in which the cam pin is positioned on the first cam portion. FIG. 11 is an operation explanatory diagram of the heart cam mechanism showing a state where the cam pin is positioned on the second cam portion. FIG. 10 is an operation explanatory view of the heart cam mechanism showing a use position (second position) of the cap. It is operation | movement explanatory drawing of the heart cam mechanism 28 which shows the state which the cam pin 42 moved toward the 3rd position. FIG. 10 is an operation explanatory view of the heart cam mechanism showing a state in which the cam pin is positioned on the third cam portion. FIG. 10 is an operation explanatory view of the heart cam mechanism showing a state in which the cam pin is in contact with the first speed reducing portion 72 of the third cam portion. FIG. 10 is an operation explanatory view of the heart cam mechanism showing a state in which the cam pin is changed from the third cam portion to the linear cam portion. FIG. 11 is an operation explanatory diagram of the heart cam mechanism showing a state in which the cam pin is in contact with the second speed reducing portion. FIG. 10 is an operation explanatory view of the heart cam mechanism showing a storage position (first position) of the cap.

Explanation of symbols

  10 ... USB memory, 22 ... mid body, 26 ... cap, 28 ... heart cam mechanism, 36 ... heart cam, 38 ... elastic member, 40 ... spring, 42 ... cam pin, 60 ... cam groove, 62... Linear cam portion, 64... First cam portion, 66... Second cam portion, 68... Third cam portion, 70.

Claims (10)

A second member coupled to the first member for linear movement;
A heart cam provided on the second member;
An elastically deformable elastic member having an elongated shape in the moving direction and having one end in the longitudinal direction attached to the first member and a cam pin that engages the heart cam at the other end in the longitudinal direction;
The cam groove of the heart cam follows the linear cam portion extending in a direction parallel to the moving direction, the curved first cam portion extending from the tip of the linear cam portion, and the first cam portion. A curved second cam portion, and a curved third cam portion connected to the tip of the linear cam portion following the second cam portion;
The second member is in the first position when the cam pin is located at the base end of the linear cam portion away from the tip, and the second pin is in the state where the cam pin is located at the second cam portion. The member is in a second position away from the first position in the movement direction, and the cam pin is located at the end of the first cam portion near the second cam portion and the third position near the second cam portion. In a state where the second member is located at the end of the cam portion, the second member becomes a third position displaced in a direction away from the first position rather than the second position,
A heart cam mechanism in which a spring for urging the two members in the direction of being positioned at the first position is provided across the first member and the second member;
The elastic member is elastically deformed via the cam pin at the tip of the linear cam portion, and the speed of the second member from the third position toward the first position by the urging force of the spring is reduced. A first reduction part is provided;
Heart cam mechanism characterized by that. The cam groove that constitutes the first deceleration portion is formed to extend with an inclination of 45 degrees or more and 90 degrees or less with respect to a direction connecting the first position and the third position.
The heart cam mechanism according to claim 1. The elastic member is elastically deformed via the cam pin to the first speed reducing portion located near the base end, and the second member is moved from the third position to the first position by the elastic force of the spring. A second speed reducing portion for reducing the speed is connected;
The heart cam mechanism according to claim 1. The second member is a limit position where the second member can move in the direction from the third position toward the first position,
A stopper mechanism is provided that restricts the movement range of the second member to the first position in the direction from the third position to the first position across the first member and the second member.
The heart cam mechanism according to claim 1. The elastic member has a main body extending linearly,
The cam pin is provided at one end in the longitudinal direction of the main body,
The other end in the longitudinal direction of the main body portion is an attachment portion attached to the first member,
In the state where the cam pin is located at the base end of the linear cam portion, the main body portion extends linearly without bending,
The first cam part and the third cam part are located at opposite positions across an extension line of the main body part extending in a straight line,
In the state where the cam pin is located in the first cam portion, the body portion is bent around the first location of the attachment portion,
In the state where the cam pin is located in the third cam portion, the main body portion is bent in a direction opposite to the bending direction around the second portion of the attachment portion,
The second location is a location deviated to the cam pin side than the first location.
The heart cam mechanism according to claim 1. A U-shaped wall for attaching the elastic member to the first member is provided,
The U-shaped wall has two sides facing each other and a curved side connecting the two sides,
The elastic member has a main body extending linearly,
The cam pin is provided at one end in the longitudinal direction of the main body,
The other end in the longitudinal direction of the main body portion is an attachment portion attached to the U-shaped wall portion,
The mounting portion includes a first linear portion held on one of the two sides facing each other, a curved portion applied to the curved side, and the other of the two sides facing each other A second linear portion engaged with one side of the
The two opposite sides extend in a direction parallel to a direction connecting the first position and the third position,
The main body portion and the second straight portion are continuous in a straight line,
In a state where the cam pin is located at the base end of the linear cam portion, the second linear portion and the main body portion extend linearly without bending,
The first cam part and the third cam part are located at opposite positions across an extension line of the main body part extending in a straight line,
In a state where the cam pin is positioned in the first cam portion, the second linear portion and the main body portion are bent around the curved portion,
In a state where the cam pin is positioned on the third cam portion, the second straight portion is applied to the other one side, and the main body portion is centered on the boundary between the second straight portion and the main body portion. Is bent in the opposite direction to the direction of bending,
The heart cam mechanism according to claim 1. The elastic member has a main body extending linearly,
The cam pin is provided at one end in the longitudinal direction of the main body,
The other end in the longitudinal direction of the main body portion is an attachment portion attached to the first member,
In the state where the cam pin is located at the base end of the linear cam portion, the main body portion extends linearly without bending,
The first cam part and the third cam part are located at opposite positions across an extension line of the main body part extending in a straight line,
In the state where the cam pin is located in the first cam portion, the body portion is bent around the first location of the attachment portion,
In the state where the cam pin is located in the third cam portion, the main body portion is bent in a direction opposite to the bending direction around the second portion of the attachment portion,
The amount of bending of the main body is larger than the amount of bending when the cam pin is positioned at the third cam portion.
The first location is a location deviated in a direction away from the cam pin than the second location.
The heart cam mechanism according to claim 1. A first member;
A second member coupled to the first member for linear movement;
An electronic device comprising a heart cam mechanism provided across the first member and the second member,
The heart cam mechanism is
A heart cam provided on the second member;
An elastically deformable elastic member having an elongated shape in the moving direction and having one end in the longitudinal direction attached to the first member and a cam pin that engages the heart cam at the other end in the longitudinal direction;
The cam groove of the heart cam follows the linear cam portion extending in a direction parallel to the moving direction, the curved first cam portion extending from the tip of the linear cam portion, and the first cam portion. A curved second cam portion, and a curved third cam portion connected to the tip of the linear cam portion following the second cam portion;
The second member is in the first position when the cam pin is located at the base end of the linear cam portion away from the tip, and the second pin is in the state where the cam pin is located at the second cam portion. The member is in a second position away from the first position in the movement direction, and the cam pin is located at the end of the first cam portion near the second cam portion and the third position near the second cam portion. In a state where the second member is located at the end of the cam portion, the second member becomes a third position displaced in a direction away from the first position rather than the second position,
A spring for urging the two members in the direction of being positioned at the first position is provided across the first member and the second member;
The elastic member is elastically deformed via the cam pin at the tip of the linear cam portion, and the speed of the second member from the third position toward the first position by the urging force of the spring is reduced. A first reduction part is provided;
An electronic device characterized by that. The electronic device is a USB memory;
The USB memory includes a mid body in which a USB connector is incorporated, and a cap slidably provided on the mid body,
The first member is the mid body;
The second member is the cap;
With the cap positioned at the first position, the USB connector is covered with the cap and becomes the storage position of the USB connector.
In a state where the cap is located at the second position, the USB connector is exposed and becomes a use position of the USB connector.
9. The electronic apparatus according to claim 8, wherein The electronic device is an imaging device;
The imaging apparatus includes a housing in which a photographing optical system is incorporated, and a lens barrier that is slidably provided in the housing and shields and exposes the photographing optical system.
The first member is the housing;
The second member is the lens barrier;
With the lens barrier positioned at the first position, the photographing optical system is covered with the lens barrier and becomes a shielding position of the photographing optical system,
In a state where the lens barrier is located at the second position, the photographing optical system is exposed and becomes a use position of the photographing optical system.
9. The electronic apparatus according to claim 8, wherein

Images