JP2006081282A - Holding leg body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance the portability of electronic equipment, such as optical equipment, that uses a secondary battery as power supply. <P>SOLUTION: A holding leg body (tripod) 10 is so designed as to hold electronic equipment (camera) 12 that is driven by a battery. The holding leg body includes: a support 14 that supports the electronic equipment; a charging circuit 24 that is provided in the support 14 and is for charging a battery; a hollow leg portion (first leg portion) 16 that is connected to the support 14 and has a hollow portion; a battery loading portion 82 that is provided in the hollow portion and to which a battery can be loaded; and a plug that is connected to a power source and supplies the charging circuit 24 with power. A vent hole may be formed in the side wall of the hollow leg portion 16. A heat transferring elastic body may be provided on the inner wall of the hollow leg portion. A spiral fin may be provided on the outer wall of the hollow leg portion. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a holding leg that holds an electronic device such as a camera or a video.

  Conventionally, in order to stably hold an optical device such as a camera or a video, a holding leg such as a monopod or a tripod has been used (for example, see Patent Document 1). On the other hand, recently, automation, high performance and digitization of optical devices such as cameras or videos have been advanced. For this reason, the power consumption of these optical devices is increasing.

  As a power source for these optical devices, a secondary battery (rechargeable battery) such as a nickel metal hydride battery or a lithium ion battery is used in consideration of the limited use of the optical device. Usually, a secondary battery that has consumed energy (discharged) by using an optical device is charged by a dedicated charger. That is, the discharged secondary battery is attached to the charger, and the plug of the charger is connected to a household AC power source (outlet) or the like, and power is supplied from the power source to the secondary battery.

JP 2004-28146 A (summary, FIG. 22 etc.)

  When an optical device using a secondary battery as a power source is used on a business trip destination or a travel destination, etc., both the holding leg and the charger must be prepared. For this reason, there is a problem that carry-on luggage increases.

  The present invention has been made in view of the above problems, and an object of the present invention is to make it easy to carry an electronic device such as an optical device using a secondary battery as a power source.

  In order to achieve the above-mentioned object, a holding leg of the present invention is a holding leg for holding an electronic device driven by a battery, and is provided on the support base for supporting the electronic device, and for charging the battery. The charging circuit is connected to the support base, and the hollow leg portion having a hollow portion is provided. The battery mounting portion is provided in the hollow portion and can be mounted with a battery. The battery is connected to a power source to supply power to the charging circuit. And a plug to be provided.

  According to the present invention, a compact holding leg having a charging function for charging a battery can be obtained. For this reason, an electronic device such as an optical device using a secondary battery as a power source is easy to carry.

  A configuration including two or more hollow legs can be employed. With this configuration, two or more battery mounting portions are provided, and two batteries can be connected in parallel to the charging circuit. As a result, a plurality of batteries can be charged at the same time, and even if the charging characteristics of one battery among the plurality of batteries to be charged deteriorate, the charging of other batteries is not adversely affected.

  The structure provided with the leg part connected to a support stand other than a hollow leg part is employable. With this configuration, the electronic device can be held in a stable state.

  A structure having a terminal serving as a relay when the plug and the charging circuit are electrically connected can be employed inside the leg portion. With this configuration, the plug and the charging circuit can be easily connected.

  A configuration in which a vent hole is provided in the side wall of the hollow leg portion can be employed. With this configuration, the heat generated inside the hollow leg portion due to charging can be efficiently released to the outside of the hollow leg portion through the vent hole, and the design can be improved.

  A configuration in which a heat transfer elastic body is provided on the inner wall of the hollow leg portion can be employed. With this configuration, the outer wall of the battery and the heat transfer elastic body can be brought into close contact with each other. For this reason, the heat generated in the battery accompanying charging can be efficiently transmitted from the outer wall of the battery to the inner wall of the hollow leg portion through the heat transfer elastic body. As a result, the heat generated inside the hollow leg due to charging can be efficiently released to the outside of the hollow leg.

  A configuration in which helical fins are provided on the outer walls of the hollow legs can be employed. With this configuration, the surface area of the outer wall of the hollow leg portion can be increased. For this reason, the heat generated inside the hollow leg portion due to charging can be efficiently discharged to the outside of the hollow leg portion through the fins. In addition, this fin can be used as an engagement portion with the cap of the hollow leg portion.

  The structure which provides a plug inside a leg part is employable. With this configuration, the holding leg can be made compact, and an electronic device such as an optical device using a secondary battery as a power source can be easily carried.

  The plug may be provided at the tip of the leg, and may be configured to be pushed out from the leg when a cap that closes the inside of the leg is removed from the leg. With this configuration, it is possible to take out the plug from the leg portion or store the plug in the leg portion with one touch.

  The first cap that is provided at the tip of the hollow leg and closes the inside of the hollow leg, and the second cap that is provided at the tip of the leg and closes the inside of the leg are configured to be distinguishable from each other. good. With this configuration, it is possible to determine the hollow leg portion to which the battery is attached and the leg portion to which the plug is connected or the plug is accommodated without removing the first cap or the second cap.

  Even if it is configured to be foldable so that it has two hollow legs and one leg, the hollow legs are arranged in parallel around the legs, and the plug is covered with the hollow legs. good. With the configuration in which the hollow leg and the leg are folded in parallel, the holding leg can be thinned. Moreover, the plug accommodated in the leg part can be protected by the configuration in which the plug is covered with the hollow leg part when folded. As a result, plug corrosion or dust adhesion to the plug can be suppressed.

  According to another aspect of the invention, there is provided a holding leg for holding an electronic device driven by a battery, a supporting base that supports the electronic device, and a first leg, a second leg, and a third that are connected to the supporting base. A leg provided with a leg, a charging circuit provided on the first leg, a battery mounting part provided on the support base and capable of mounting a battery, and a plug connected to a power source for supplying power to the charging circuit; , Has.

  According to the present invention, a compact holding leg having a charging function for charging a battery can be obtained. For this reason, an electronic device such as an optical device using a secondary battery as a power source is easy to carry.

  According to another aspect of the present invention, there is provided a holding leg that holds an electronic device driven by a battery, and includes a support base that supports the electronic device, and a large-diameter hollow body and a small-diameter hollow body connected to the support base. , At least one leg that can be expanded and contracted by inserting / removing the small-diameter hollow body into / from the large-diameter hollow body, a battery inlet / outlet provided on the side wall of the small-diameter hollow body, a charging circuit for charging the battery, and a power source And a plug for supplying power to the charging circuit. The battery is mounted inside the leg portion, and the battery is charged with the leg portion contracted.

  According to the present invention, a compact holding leg having a charging function for charging a battery can be obtained. For this reason, an electronic device such as an optical device using a secondary battery as a power source is easy to carry. Further, the leg portion of the holding leg can be extended and retracted, and the battery can be easily mounted inside the leg portion.

  According to the present invention, it is possible to easily carry an electronic device such as an optical device using a secondary battery as a power source.

  Hereinafter, the holding leg according to each embodiment of the present invention will be described with reference to the drawings.

(First embodiment)
First, a tripod 10 as a holding leg according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 13.

  FIG. 1 is an external view of a tripod 10. FIG. 2 is a cross-sectional view when the tripod 10 is cut in the vertical direction. The tripod 10 includes a support base 14 that supports a digital camera (hereinafter simply referred to as a “camera”) 12 that is an example of an electronic device, and a first leg 16 that is connected to the support base 14 at one end. A leg 22 having the second leg 18 and the third leg 20 and a plug 26 (see FIG. 12) connected to a power source and supplying power to a charging circuit 24 described later.

  The support base 14 includes a base 30, a camera platform 32 on which the camera 12 is placed, a camera fixing screw 34 into which the camera 12 is fitted, a ball joint 35 that rotates the camera platform 32, and a rotation of the ball joint 35. And a pan head fixing screw 36 that allows or suppresses the above.

  The base 30 has a substantially disk shape provided with a hemispherical concave portion 40 into which a sphere 38 of the ball joint 35 is inserted at the center. In addition, one end of the first leg 16, the second leg 18 and the third leg 20 constituting the leg 22 is connected to the bottom surface 42 of the base 30.

  FIG. 3 is an external view when the base 30 is viewed from the direction of the bottom surface 42. As shown in FIG. 3, the first leg portion 16, the second leg portion 18, and the third leg portion 20 are respectively a first connecting portion 44, a second connecting portion 46, and a third connecting portion 48, and a rotation shaft 50. And is connected to the bottom surface 42 of the base 30 through a rotating bearing 52. The first leg portion 16, the second leg portion 18, and the third leg portion 20 are independently rotatable in the radial direction of the bottom surface 42 of the base 30. The tripod 10 is configured so that friction between the first connecting portion 44, the second connecting portion 46, the third connecting portion 48, and the rotation shaft 50 is increased. For this reason, after the user of the tripod 10 moves the leg body 22 to set the desired opening degree, the leg body 22 does not move arbitrarily. In addition, it is good also as providing the rotation locking mechanism which suppresses rotation of the leg body 22 in the base 30 grade | etc., And fixing the leg body 22 by the desired opening degree more reliably.

  As shown in FIG. 1, the pan head 32 has a substantially rectangular plate shape, and includes a charging circuit 24 that receives power and charges a battery 56 such as a secondary battery. Note that the charging circuit 24 may be provided other than the inside of the pan head 32, for example, inside the base 30 or inside the ball joint 35.

  A camera fixing screw 34 is provided at the center of the surface of the pan head 32 on which the camera 12 is placed (hereinafter referred to as “camera placement surface”) 58 so as to protrude from the pan head 32. The camera fixing screw 34 has a helical thread formed on its outer wall. On the other hand, the bottom surface 60 of the camera 12 is provided with a screw hole. The camera 12 can be securely held on the tripod 10 by fitting the screw hole into the camera fixing screw 34 and rotating the camera 12 until the bottom surface 60 of the camera 12 and the camera mounting surface 58 come into contact with each other.

  In the tripod 10 according to the first embodiment, the camera 12 is attached to the tripod 10 by engaging the screw hole provided on the bottom surface 60 of the camera 12 with the camera fixing screw 34 provided on the camera platform 32. However, instead of this, the pan head 32 is composed of a magnet that generates a magnetic field that does not affect the operation of the camera 12, and at least a part of the bottom surface 60 of the camera 12 is composed of a magnetic material. Thus, the camera 12 may be fixed to the pan head 32. In addition, the camera mounting surface 58 of the pan head 32 is made of a non-slip material such as rubber or cloth, or has a non-slip shape such as an unevenness or a protrusion, thereby making the camera 12 under its own weight. The head 32 may be held.

  The ball joint 35 is made of a metal such as stainless steel, and includes a sphere portion 38 and a shaft portion 62 formed integrally with the sphere portion 38. An end portion of the shaft portion 62 opposite to the sphere portion 38 side is connected to the center of the bottom surface 66 of the camera platform 32. In addition, all or arbitrary two of the camera fixing screw 34, the pan head 32, and the shaft portion 62 may be integrally formed.

  The ball joint 35 is three-dimensionally rotatable within a certain range within the recess 40 of the base 30. For this reason, the direction of the camera 12 held on the camera platform 32 can be changed and set according to the situation at the time of shooting.

  The pan head fixing screw 36 includes a screw part 70 and a knob part 72. One end of the screw portion 70 is connected to the knob portion 72, and the end surface 74 at the other end has a spherical concave shape. In a state where the camera 12 held on the tripod 10 is directed toward the subject, when the knob portion 72 is rotated and the camera platform fixing screw 36 contacts the ball joint 35, the end surface 74 of the screw portion 70 is connected to the ball joint 35. The ball joint 35 is fixed by pressing the surface of the sphere 38. As described above, the camera head 12 is fixed in a state of being directed toward the subject by the head fixing screw 36 pressing the ball joint 35.

  On the other hand, when the knob portion 72 is rotated in the direction opposite to the above while the end surface 74 of the screw portion 70 is pressing the surface of the sphere portion 38 of the ball joint 35, the end surface 74 of the screw portion 70 is The ball joint 35 becomes rotatable away from the surface of the sphere 38. Thus, the camera 12 is in a state where the direction can be changed.

  In the tripod 10 according to the first embodiment, the ball joint 35 is fixed by pressing the surface with the pan head fixing screw 36, but instead of this, the surface of the sphere part 38 of the ball joint 35 and The ball joint 35 and / or the base 30 may be configured so that the frictional force with the surface of the recess 40 of the base 30 is increased, and the arrangement of the pan head fixing screw 36 may be omitted. In this case, the ball joint 35 needs to be configured so as to move with the force of the user of the camera 12 but not with the weight of the camera 12. Further, by increasing the weight of the ball joint 35 itself, it may be moved by the user's power of the camera 12 but may not be moved by its own weight.

  FIG. 4 is a view showing a modified example of the support base 14. In the tripod 10 according to the first embodiment, the ball joint 35 is configured to be three-dimensionally rotatable within a certain range within the recess 40 of the base 30. Instead, as shown in FIG. 4, the orientation of the camera 12 may be changed by using a joint 76 that can be independently rotated in a vertical plane and a horizontal plane.

  The leg body 22 is composed of three legs, that is, a first leg 16, a second leg 18, and a third leg 20. The tripod 10 according to the first embodiment literally has three legs, but instead of this, a holding leg having two or four or more legs may be used.

  FIG. 5 is a cross-sectional view of the first leg portion 16 (third leg portion 20). As shown in FIG. 5, the first leg portion 16 is a hollow leg portion including a hollow portion 80 and has a substantially cylindrical shape. In addition, the shape of the 1st leg part 16 is not limited to substantially cylindrical shape. For example, the shape may be a substantially prismatic shape, a substantially truncated cone shape, a substantially truncated pyramid shape, a substantially bow shape, or the like. The hollow portion 80 includes a battery mounting portion 82 to which the battery 56 can be mounted, and a coil spring that electrically connects one of the electrodes (for example, the positive electrode) of the battery 56 mounted to the battery mounting portion 82 to the charging circuit 24. 84 is provided. By providing the coil spring 84, one of the poles of the battery 56 and the charging circuit 24 can be reliably conducted. Instead of the coil spring 84, another elastic conductor such as a metal leaf spring or conductive rubber may be provided.

  In addition, the first leg portion 16 includes a first cap 86 that opens and closes the hollow portion 80 at an end opposite to the end connected to the bottom surface 42 of the base 30. The first cap 86 includes a coil spring 88 that grounds the other pole (for example, the negative electrode) of the battery 56 attached to the battery attachment portion 82, and a screw thread 90 provided on the inner wall of the first leg portion 16. Engaging threads 92. Similar to the coil spring 84, another elastic conductor may be provided instead of the coil spring 88.

  Here, the procedure from the state in which the hollow portion 80 is closed by the first cap 86 and the battery 56 is not attached to the battery attachment portion 82 to the attachment of the battery 56 to the battery attachment portion 82 is simple. Explained.

  First, the first cap 86 is rotated to remove the first cap 86 from the first leg portion 16. Next, the battery 56 is inserted into the hollow portion 80 of the first leg portion 16 with the positive electrode of the battery 56 on the back side and the negative electrode on the front side. Next, the first cap 86 is fitted into the first leg portion 16, and the first cap 86 is rotated in the opposite direction. As a result, the battery 56 is attached to the battery attachment portion 82. In this state, if electric power is supplied to the charging circuit 24, the battery 56 is charged. In the tripod 10 according to the first embodiment, the number of the batteries 56 attached to the battery attachment part 82 of the first leg part 16 is one, but instead of this, two or more batteries 56 are provided. The first leg 16 may be configured to be mounted in series.

  The tripod 10 according to the first embodiment is configured such that the coil springs 84 and 88 are disposed on both pole sides of the battery 56 to be mounted. A coil spring may be arranged only on the side. In addition, metal terminals may be provided on both sides of the battery 56 to be mounted, and the coil springs 84 and 88 may not be provided.

  6 and 7 are cross-sectional views showing modifications of the first cap 86. In the tripod 10 according to the first embodiment, the first cap 86 is attached to the first leg portion 16 by screw engagement. Instead, the first leg portion 16 and the first cap 86 are attached. May be connected via a hinge mechanism, and the first cap 86 may be fitted into the first leg portion 16 (see FIG. 6). Moreover, you may comprise so that the opening ends of the 1st leg part 16 and the 1st cap 86 may be joined by magnetic force (refer FIG. 7).

  As shown in FIG. 6, the first leg 16 and the first cap 86 are connected via a hinge mechanism, and the first cap 86 is fitted into the first leg 16, thereby adopting a first configuration. The first cap 86 can be attached to and detached from the one leg portion 16 with one hand, and the possibility of losing the first cap 86 is almost eliminated. In addition, as shown in FIG. 7, by adopting a configuration in which the opening ends of the first leg portion 16 and the first cap 86 are joined by magnetic force, the first cap 86 with respect to the first leg portion 16 is adopted. Can be quickly attached and detached.

  The first leg 16 is made of a metal such as aluminum or magnesium alloy that is lightweight, strong, and has high heat transfer properties. Since the first leg portion 16 is made of a material having high heat transfer properties, heat generated inside the first leg portion 16 due to charging can be efficiently released to the outside of the first leg portion 16. it can.

  8 to 10 are cross-sectional views showing modified examples of the first leg portion 16. In the tripod 10 according to the first embodiment, the first leg portion 16 is formed of a material having high heat transfer properties, but instead of or in combination with this, the side wall of the first leg portion 16 is formed. It is also possible to adopt a configuration in which a ventilation hole 98 is provided (see FIG. 8). Moreover, you may make it the structure by which the heat transfer elastic body 100 with a high heat transfer rate and elasticity is provided in the inner wall of the 1st leg part 16 (refer FIG. 9). Furthermore, a configuration may be adopted in which helical fins 102 are provided on the outer wall of the first leg portion 16 (see FIG. 10). Moreover, you may combine the structure of these modifications arbitrarily, and also what combined these structures of the modifications arbitrarily is used for the 1st leg part 16 of the tripod 10 which concerns on 1st Embodiment. It may be applied.

  As shown in FIG. 8, by adopting a configuration in which a vent hole 98 is provided in the side wall of the first leg portion 16, heat generated in the first leg portion 16 due to charging is generated by the vent hole. It can be efficiently discharged to the outside of the first leg portion 16 via 98, and the design can be improved. Further, whether or not the battery 56 is mounted inside the first leg portion 16 can be visually confirmed through the vent hole 98.

  Moreover, as shown in FIG. 9, by adopting a configuration in which the heat transfer elastic body 100 such as a rubber sheet is provided on the inner wall of the first leg portion 16, the outer wall of the battery 56 and the heat transfer elastic body 100 are connected. It can be adhered. Therefore, heat generated in the battery 56 due to charging can be efficiently transmitted from the outer wall of the battery 56 to the inner wall of the first leg portion 16 via the heat transfer elastic body 100. As a result, heat generated inside the first leg portion 16 due to charging can be efficiently released to the outside of the first leg portion 16.

  As shown in FIG. 10, the surface area of the outer wall of the first leg portion 16 can be increased by adopting a configuration in which the spiral fins 102 are provided on the outer wall of the first leg portion 16. For this reason, the heat generated inside the first leg portion 16 due to charging can be efficiently released to the outside of the first leg portion 16 through the fins 102. In addition, the fin 102 can be an engagement portion (thread) with the first cap 86 of the first leg portion 16.

  FIG. 11 is a cross-sectional view of the second leg portion 18. FIG. 12 is an external view of the connection cord 110 including the plug 26. As shown in FIG. 11, unlike the first leg portion 16, the second leg portion 18 is a leg portion having a structure in which the battery 56 cannot be inserted, and has a substantially cylindrical shape. The second leg portion 18 includes a conductive terminal 112 serving as a relay when the plug 26 and the charging circuit 24 are electrically connected to each other.

  The terminal 112 is equivalent to the terminal 112 connected to the power source of the charging circuit 24 being drawn into the second leg 18. The terminal 112 includes two concave portions 118 corresponding to two convex portions 116 of the connection terminal 114 described later. Note that the shape of the second leg portion 18 is not limited to a substantially cylindrical shape, like the first leg portion 16. For example, the shape of the second leg portion 18 may be a substantially prismatic shape, a substantially truncated cone shape, a substantially truncated pyramid shape, a substantially bow shape, or the like.

  Further, the second leg portion 18 includes a second cap 120 at an end portion opposite to an end portion connected to the bottom surface 42 of the base 30. The second cap 120 includes a screw thread 124 that engages with a screw thread 122 provided on the inner wall of the second leg 18, and can be attached to and detached from the second leg 18 by rotating. It is configured.

  As shown in FIG. 12, the connection cord 110 includes a plug 26, a wiring 128 connected to the plug 26, and a connection terminal 114 connected to the wiring 128. The plug 26 includes two power connection portions 130. The power supply connection unit 130 has a shape that can be electrically connected to a household AC power supply (outlet), a power supply in a car, a generator, or the like. The connection terminal 114 has two convex portions 116 that can be electrically connected to the two concave portions 118 of the terminal 112 inside the second leg portion 18. At least a part of the connection terminal 114 other than the two convex portions 116 is made of a magnetic material. Further, a magnet is provided at a part of the terminal 112 other than the two recesses 118. For this reason, the connection terminal 114 and the terminal 112 are strongly adsorbed by the magnetic force, and as a result, the two convex portions 116 of the connection terminal 114 and the two concave portions 118 of the terminal 112 can be reliably conducted.

  In the tripod 10 according to the first embodiment, the connection terminal 114 is provided with a protrusion 116 and the terminal 112 is provided with a recess 118. Instead, the connection terminal 114 is provided with a protrusion 118, respectively. May be provided with a recess, and the terminal 112 may be provided with a protrusion. In the tripod 10 according to the first embodiment, the magnet is provided toward the terminal 112. Alternatively, the magnet may be provided toward the connection terminal 114. Further, in the tripod 10 according to the first embodiment, the connection terminal 114 and the terminal 112 are attracted by the magnetic force, but instead, the size of the convex portion 116 of the connection terminal 114 is changed to the size of the terminal 112. The connecting terminal 114 and the terminal 112 are made slightly larger than the size of the concave portion 118 by the pressing force between the convex portion 116 and the concave portion 118 when the connection terminal 114 is fitted into the terminal 112 without providing a magnet. You may make it conduct reliably.

  Here, the procedure from the state in which the second cap 120 is attached to the second leg portion 18 and the battery 56 is attached to the battery attachment portion 82 until the battery 56 is charged will be briefly described. To do.

  First, the second cap 120 is rotated to remove the second cap 120 from the second leg portion 18. Next, the connection terminal 114 of the connection cord 110 is attracted to the terminal 112 inside the second leg 18. Next, the plug 26 is inserted into a power source such as an outlet. As a result, electric power is supplied from the power source to the battery 56 via the plug 26, the wiring 128, the connection terminal 114, the terminal 112, and the charging circuit 24 in order. A detailed mechanism for charging the battery 56 will be described later.

  In the tripod 10 according to the first embodiment, the second cap 120 is attached to the second leg 18 by screw engagement. Instead, the second leg 18 and the second leg 18 are attached. The cap 120 may be connected via a hinge mechanism, and the second cap 120 may be fitted into the second leg portion 18, or the second cap 120 and the terminal 112 may be adsorbed by magnetic force, You may comprise so that the 2nd cap 120 may be attached to the 2nd leg part 18, and the 2nd cap 120 is provided with two convex parts corresponding to the two recessed parts 118 of the terminal 112, and the 2nd cap 120 is attached. The second cap 120 may be attached to the second leg portion 18 by fitting into the terminal 112.

  The third leg portion 20 is a hollow leg portion configured similarly to the configuration of the first leg portion 16 (see FIG. 5, where the reference numeral of the third leg portion corresponds to the inside of parentheses). That is, one end of the third leg portion 20 is connected to the bottom surface 42 of the base 30. Further, as shown in FIG. 5, the third leg portion 20 is connected to the hollow portion 132, the battery mounting portion 134 provided in the hollow portion 132 to which the battery 56 can be mounted, and the bottom surface 42 of the base 30. And a third cap 138 that opens and closes the hollow portion 132 provided at the end opposite to the end. For this reason, the battery 56 can be attached to the battery attachment part 134, and the two batteries 56 can be connected in parallel to the charging circuit 24. As a result, a plurality of batteries 56 can be charged at the same time, and even if the charging characteristics of one of the batteries 56 to be charged deteriorate, the charging of other batteries 56 is not adversely affected.

  Next, a method for charging the battery 56 using the charging circuit 24 will be described.

  First, the charging circuit 24 detects the temperature of the battery 56 at the start of charging. Next, the charging circuit 24 supplies the power supplied from the power source to the battery 56. At this time, the current value that the charging circuit 24 passes through the battery 56 is controlled as needed based on the change in the temperature rise of the battery 56 with respect to the charging time. This control is performed by comparing the change in the temperature rise of the battery with respect to the charging time in the efficient charging stored in advance in the charging circuit 24 and the change in the temperature rise of the battery 56 with respect to the actual charging time.

  That is, when the change in the temperature rise of the battery 56 with respect to the actual charging time is smaller than the change in the temperature rise of the battery with respect to the charging time in efficient charging, the value of the current flowing through the battery 56 is increased, and the battery with respect to the actual charging time is increased. When the change in the temperature rise of 56 is larger than the change in the temperature rise of the battery with respect to the charging time in efficient charging, the value of the current passed through the battery 56 is reduced. For this reason, it is possible to charge the battery 56 in a short time while preventing an excessive increase in temperature of the battery 56.

  Charging ends when the battery 56 reaches a predetermined temperature, when the battery 56 reaches a predetermined voltage, or when a predetermined charging time has elapsed.

(Second Embodiment)
Next, a tripod 140 according to the second embodiment will be described with reference to FIGS. In the tripod 140 according to the second embodiment, the second leg 142 and the plug 144 are mainly different from the tripod 10 according to the first embodiment. Therefore, the second leg 142 and the plug 144 will be mainly described.

  FIG. 13 is an external view of the vicinity of a leg 146 of a tripod 140 according to the second embodiment, a part of which is a cross-sectional view. In the tripod 140 according to the second embodiment, as shown in FIG. 13, the plug 144 is provided inside the second leg 142 which is a leg. Since the plug 144 is provided inside the second leg 142, there is almost no risk of losing the plug 144. Also, the tripod 140 is more portable.

  The wiring 148 has one end connected to the plug 144 and the other end electrically connected to the charging circuit 24 provided inside the camera platform 32. When the plug 144 is inserted into a power source such as an outlet, the second cap 120 is removed from the second leg portion 142 and the plug 144 is pulled out from the second leg portion 142.

  FIG. 14 is an external view in which a part of the second leg 150 according to the first modified example in which the second leg 142 is deformed is a cross-sectional view. As shown in FIG. 14, the second leg 150 is a leg having a plug lever 151 on the side wall. The plug lever 151 is moved along a substantially J-shaped groove 152 formed on the side wall of the second leg 150. A coil spring 154 is connected to the back surface of the plug 144 provided in the second leg 150, and the power connection of the plug 144 from the second leg 150 in a state where no restoring force is generated in the coil spring 154. The second leg 150 is configured such that the 156 does not protrude. At this time, the plug lever 151 is disposed at one end 152 a of the groove 152.

  By removing the second cap 120 from the second leg 150 and moving the plug lever 151 from one end 152 a of the groove 152 to the other end 152 b, the power connection part 156 of the plug 144 is protruded from the second leg 150. The power supply can be connected. In this first modification, the second cap 120 is removed from the second leg 150 and the power connection part 156 of the plug 144 is projected from the second leg 150. Instead, the second cap 120 120, two holes corresponding to the shape of the power supply connection portion 156 are provided, and the power connection portion 156 of the plug 144 may protrude from the second leg portion 150 while the second cap 120 is attached to the second leg portion 150. good. Further, the second cap 120 is not provided, and two holes corresponding to the shape of the power supply connection part 156 are provided at the tip of the second leg part 150, and the power supply connection part 156 of the plug 144 is connected to the second leg from these two holes. You may make it protrude from the part 150. FIG.

  FIG. 15 is an external view in which a part of the second leg 160 according to a second modified example in which the second leg 142 is deformed is a cross-sectional view. As shown in FIG. 15, the second leg portion 160 is a leg portion in which a plug 144 and a coil spring 162 connected to the back surface of the plug 144 are provided. The second leg portion 160 is configured such that the power connection portion 156 protrudes from the second leg portion 160 in a state where no restoring force is generated in the coil spring 162.

  That is, when the second cap 120 is removed from the end of the second leg 160 that is not connected to the base 30, the plug 144 is configured to be pushed out from the end of the second leg 160. Yes. For this reason, it is possible to take out the plug 144 from the second leg portion 160 and store the plug 144 in the second leg portion 160 with one touch. In a state where the plug 144 is pushed out from the second leg portion 160, the power connection portion 156 of the plug 144 can be connected to a power source.

  Further, the plug 144 is pushed into the second leg portion 160 and the second cap 120 is attached to the second leg portion 160, whereby the plug 144 is accommodated in the second leg portion 160. The tripod 140 can be used as a tripod in a state where the plug 144 is housed in the second leg portion 160. Instead of pushing the plug 144 into the second leg 160 and then attaching the second cap 120 to the second leg 160, the second cap 120 pushes the plug 144 into the second leg 160 while The second cap 120 may be attached to the two leg portions 160.

  In the tripod 10 according to the first embodiment and the tripod 140 according to the second embodiment, the first cap 86 and the second cap 120 are preferably configured to be distinguishable from each other. With this configuration, the first leg portion 16 to which the battery 56 is attached, the second leg portion 18 that connects the plug 26, or the second leg portions 142, 150, and 160 in which the plug 144 is housed are connected to the first leg portion 16. The determination can be made without removing the cap 86 or the second cap 120. For example, the first cap 86 and the second cap 120 have different appearance colors, or the first cap 86 and the second cap 120 have different appearance shapes. Is mentioned.

(Third embodiment)
Next, a tripod 170 according to the third embodiment will be described with reference to FIGS. 16 to 18. In a tripod 170 according to the third embodiment, a leg 174 is mainly different from the tripod 10 according to the first embodiment. Therefore, the leg 174 will be mainly described.

  FIG. 16 is an external view when the tripod 170 according to the third embodiment is folded. FIG. 17 is an external view when the leg 174 of the tripod 170 of FIG. 16 is opened. FIG. 18 is an external view of the second leg 176 showing a modification in which the direction of the plug 144 housed in the second leg 176 is changed. In the tripod 170 according to the third embodiment, as shown in FIG. 16, the first leg portion 182, the second leg portion 176, and the third leg portion 184 have a substantially quadrangular prism shape. The tripod 170 can be folded so that the first leg 182, the second leg 176, and the third leg 184 are juxtaposed around the second leg 176. For this reason, the tripod 170 can be thinned when folded.

  A plug 186 is housed inside the side wall of the second leg 176, and the plug 186 appears from the second leg 176 by pushing down the plug 186. For this reason, the plug 186 can be easily stored and taken out. Note that the orientation of the plug 186 when the plug 186 is accommodated is not limited. The orientation of the plug 186 shown in FIG. 17 or the orientation of the plug 186 shown in FIG. The plug 186 shown in FIG. 18 is pushed down while being rotated via the rotation mechanism 189, and emerges from the second leg portion 176.

  However, the length of the portion of the plug 186 that is pushed down so that the power supply connection portion 188 is disposed outside the first leg portion 182 or the third leg portion 184 with the plug 186 appearing from the second leg portion 176. Need to be configured. The length of the portion where the plug 186 is pushed down is configured so that the power supply connection portion 188 is disposed outside the first leg portion 182 or the third leg portion 184 in a state where the plug 186 appears from the second leg portion 176. Otherwise, the first leg portion 182 or the third leg portion 184 will become an obstacle, and the plug 186 cannot be inserted into a wall power source such as an outlet.

  It should be noted that a battery mounting portion may be provided on the second leg portion 176 so that the plug 186 is accommodated inside the outer side wall of the first leg portion 182 or the third leg portion 184. In this case, the outer side wall of the first leg portion 182 or the third leg portion 184 in which the plug 186 is accommodated can be brought close to a power source such as an outlet, so that the area where the plug 186 is pushed down is reduced. be able to.

  The storage position of the plug 186 in the second leg 176 is set so that the plug 186 stored in the second leg 176 is covered with the first leg 182 when the tripod 170 is folded. For this reason, when the tripod 170 is folded, the plug 186 accommodated in the second leg portion 176 can be protected. As a result, corrosion of the power supply connection portion 188 of the plug 186 or adhesion of dust to the power supply connection portion 188 of the plug 186 can be suppressed.

  The storage position of the plug 186 in the second leg 176 may be a position where the plug 186 stored in the second leg 176 is covered with the third leg 184 when the tripod 170 is folded. Further, when the tripod 170 is folded, the plug 186 may be housed inside the side wall of the first leg 182 adjacent to the second leg 176, or the second leg 184 may be The plug 186 may be housed inside the side wall adjacent to the leg 176. That is, when the tripod 170 is folded, the plug 186 housed in the legs 182, 176, 184 may be covered with the other legs 182, 176, 184.

  Instead of the configuration in which the plug 186 is accommodated in the legs 182, 176, 184, a terminal 112 electrically connected to the charging circuit 24 is provided on the bottom surface 66 of the pan head 32, and a connection cord is connected to this terminal 112. 110 connection terminals 114 may be connected. In this manner, by providing the terminal 112 on the bottom surface 66 of the pan head 32, the operation of connecting the connection cord 110 to the terminal 112 is facilitated.

(Fourth embodiment)
Next, a tripod 190 according to the fourth embodiment will be described with reference to FIGS. 19 and 20. In a tripod 190 according to the fourth embodiment, a camera platform 192 and a first leg 194 are mainly different from the tripod 10 according to the first embodiment. Therefore, the camera platform 192 and the first leg 194 will be mainly described.

  FIG. 19 is an external view in which a part of a tripod 190 according to the fourth embodiment is a cross-sectional view. In the tripod 190 according to the fourth embodiment, as shown in FIG. 19, the battery mounting part 196 is provided on the camera platform 192, and the charging circuit 24 is provided on the first leg part 194. For this reason, many batteries 56 can be charged compared with the tripod 10,140,170 which concerns on other embodiment. Further, since the charging circuit 24 is provided in the first leg portion 194 and the battery mounting portion 82 is not provided, the first cap 86 that is the mounting opening and the outlet of the battery 56 is not necessary. It should be noted that the connection cord 110 is connected to the camera platform 192 so that the battery 56 is mounted inside the second leg 198 as the hollow leg and / or the third leg 200 as the hollow leg. 190 may be configured. With this configuration, more batteries 56 can be charged simultaneously.

  The camera platform 192 includes a main body portion 202 provided with a battery mounting portion 196 and a lid portion 204 that covers the main body portion 202. The main body 202 is configured such that a plurality of (for example, four) batteries 56 can be mounted in parallel. The lid 204 is fitted into the main body 202 after the camera fixing screw 34 passes through the hole 206 provided in the center of the lid 204. The lid 204 may be configured so that the inner wall of the hole 206 is threaded and the lid 204 is rotated and brought closer to the main body 202 while the hole 206 and the camera fixing screw 34 are engaged. good.

  Power supply to the charging circuit 24 is performed by connecting the connection cord 110 to the terminal 112 provided inside the second leg 198, similarly to the tripod 10 according to the first embodiment. Instead, as with the tripod 140 according to the second embodiment, power may be supplied by the plug 144 provided inside the second leg 198, or the tripod 170 according to the third embodiment. Similarly, power may be supplied by a plug 144 provided inside the side wall of the second leg 198.

  FIG. 20 is an external view showing a pan head 208 which is a modified example of the pan head 192. As shown in FIG. 20, the camera platform 208 is configured such that the battery 56 can be mounted from the side. For this reason, installation of the cover part 204 can be omitted. The number of side surfaces on which the battery 56 of the camera platform 208 can be attached can be arbitrarily set within a range of one to four.

(Fifth embodiment)
Next, a tripod 210 according to the fifth embodiment will be described with reference to FIGS. In a tripod 210 according to the fifth embodiment, a leg 212 is mainly different from the tripod 10 according to the first embodiment. Therefore, the leg 212 will be mainly described.

  FIG. 21 is an external view of a tripod 210 according to the fifth embodiment. 22 is a sectional view of the first leg 214 of the tripod 210 in FIG. A tripod 210 according to the fifth embodiment includes a leg 212 composed of a first leg 214, a second leg 216 and a third leg 218, as shown in FIG. The first leg 214 includes a large diameter hollow body 220 and a small diameter hollow body 221. The first leg 214 is a hollow leg having a battery mounting portion 222 therein.

  As shown in FIG. 22, the large-diameter hollow body 220 has a substantially cylindrical shape in which one end is open and the other end is sealed. The large-diameter hollow body 220 is connected to the bottom surface 42 of the base 30 at the sealed end. Further, inside the sealed end portion, an electrode terminal 224 with which one electrode (for example, positive electrode) of the battery 56 attached to the battery attachment portion 222 contacts is provided. The electrode terminal 224 is electrically connected to the charging circuit 24 disposed inside the camera platform 32. At the open end of the large-diameter hollow body 220, there is provided a large-diameter protrusion 226 formed by slightly bending the tip of the large-diameter hollow body 220 inward.

  The small-diameter hollow body 221 has a hollow substantially cylindrical shape in which one end is open and the other end is sealed. Inside the sealed end of the small-diameter hollow body 221 is provided an electrode terminal 228 with which the other electrode (for example, the negative electrode) of the battery 56 attached to the battery attachment part 222 contacts. The electrode terminal 228 is grounded. At the open end of the small-diameter hollow body 221, there is provided a small-diameter protrusion 230 formed by slightly bending the tip of the small-diameter hollow body 221 outward. In addition, a side wall of the small-diameter hollow body 221 is provided with an insertion / extraction port 232 for the battery 56.

  The outer diameter of the small-diameter hollow body 221 is slightly smaller than the inner diameter of the large-diameter hollow body 220. Further, as shown in FIG. 22, the large-diameter hollow body 220 and the small-diameter hollow body 221 are fitted so that the large-diameter hollow body 220 is outside the small-diameter hollow body 221 at their open ends. Are combined. And the 1st leg part 214 is comprised so that expansion-contraction is possible by taking in and out the small diameter hollow body 221 in the inside of the large diameter hollow body 220. FIG.

  The second leg portion 216 and the third leg portion 218 are also hollow leg portions configured in the same manner as the first leg portion 214. The charging circuit 24 is supplied with power by a connection cord 110 connected to a terminal 112 provided on the bottom surface 66 of the pan head 32. With the above-described configuration, in the tripod 210 according to the fifth embodiment, the leg body 212 can be made telescopic, and the battery 56 can be easily mounted inside the leg body 212 (battery mounting portion 222). Can do.

  FIG. 23 is a cross-sectional view of the tripod 210 of FIG. 21 when the first leg 214 is extended. When the first leg portion 212 is extended, as shown in FIG. 23, the large-diameter body projecting portion 226 of the large-diameter hollow body 220 and the small-diameter body projecting portion 230 of the small-diameter hollow body 221 come into contact with each other. The small-diameter hollow body 221 is configured not to be detached from 220.

  24 is a cross-sectional view when the first leg 214 of the tripod 210 in FIG. 21 is contracted. As shown in FIG. 24, the first leg 214 is configured such that when it is contracted, the positive electrode part of the battery 56 attached to the small-diameter hollow body 221 collides with the electrode terminal 224 and does not contract any further. . The battery 56 is charged with the first leg 214 contracted.

  As mentioned above, although each embodiment of this invention was described, this invention can be variously modified in addition to this. For example, the tripods 10, 140, 170, 190, and 210 according to the embodiments fix the camera 12 as an example of an electronic device, but instead, a video camera, a mobile phone with a camera, or a flashlight Etc. may be fixed.

  The present invention can be used for a holding leg that holds an electronic device such as a digital camera.

It is the external view which made some tripods based on the 1st Embodiment of this invention a cross-sectional view. It is sectional drawing of the tripod of FIG. It is an external view when the base of the tripod of FIG. 1 is seen from the direction of the bottom surface. It is a figure which shows the modification of the support stand of the tripod of FIG. It is sectional drawing of the 1st leg part (3rd leg part) of the tripod of FIG. It is sectional drawing which shows the modification of the 1st cap of the tripod of FIG. It is sectional drawing which shows the other modification of the 1st cap of the tripod of FIG. It is sectional drawing which shows the modification of the 1st leg part of the tripod of FIG. It is sectional drawing which shows the other modification of the 1st leg part of the tripod of FIG. It is sectional drawing which shows the other modification of the 1st leg part of the tripod of FIG. It is sectional drawing of the 2nd leg part of the tripod of FIG. It is an external view of a connection cord provided with the tripod plug of FIG. It is an external view of the tripod which concerns on the 2nd Embodiment of this invention. It is the external view which made a part sectional view which shows the 1st modification of the 2nd leg part of the tripod of FIG. It is the external view which made some cross sections the 2nd modification of the 2nd leg part of the tripod of FIG. It is an external view in the state in which the tripod which concerns on the 3rd Embodiment of this invention was folded. It is an external view in the state which the leg of the tripod of FIG. 16 opened. It is an external view which shows the modification of the 2nd leg part of the tripod of FIG. It is an external view of the tripod which concerns on the 4th Embodiment of this invention. It is an external view which shows the modification of the pan head of the tripod of FIG. It is an external view of the tripod which concerns on the 5th Embodiment of this invention. It is sectional drawing of the 1st leg part of the tripod of FIG. It is sectional drawing when the 1st leg part of the tripod of FIG. 21 is extended. It is sectional drawing when the 1st leg part of the tripod of FIG. 21 is shrunk.

Explanation of symbols

10 tripod 12 camera 14 support base 16 first leg (hollow leg)
18 Second leg (leg)
20 Third leg (hollow leg)
22 Leg 24 Charging Circuit 26 Plug 30 Base 32 Head 34 Camera Fixing Screw 35 Ball Joint 36 Head Fixing Screw 56 Battery 80 Hollow Part 82 Battery Mounting Part 86 First Cap 110 Connection Cord 112 Terminal 120 Second Cap 132 Hollow Part 134 Battery mounting part 138 Third cap 140 Tripod 142 Second leg (leg part)
150 Second leg (leg)
170 Tripod 176 Second leg (leg)
182 First leg (hollow leg)
184 Third leg (hollow leg)
190 Tripod 194 First leg (leg)
198 Second leg (hollow leg)
200 Third leg (hollow leg)
210 Tripod 214 First leg (hollow leg)
216 Second leg (hollow leg)
218 Third leg (hollow leg)

Claims (13)

In a holding leg that holds an electronic device driven by a battery,
A support base for supporting the electronic device;
A charging circuit provided on the support base for charging the battery;
A hollow leg connected to the support and having a hollow part;
A battery mounting portion provided in the hollow portion and capable of mounting the battery;
A plug connected to a power source for supplying power to the charging circuit;
A holding leg characterized by comprising:   The holding leg according to claim 1, comprising two or more hollow legs.   The holding leg according to claim 1, further comprising a leg connected to the support base in addition to the hollow leg.   The holding leg according to claim 3, further comprising a terminal serving as a relay when the plug and the charging circuit are electrically connected to each other inside the leg.   The holding leg according to any one of claims 1 to 4, wherein a vent hole is provided in a side wall of the hollow leg portion.   The holding leg body according to any one of claims 1 to 5, wherein a heat transfer elastic body is provided on an inner wall of the hollow leg portion.   The holding leg according to any one of claims 1 to 6, wherein a helical fin is provided on an outer wall of the hollow leg portion.   4. The holding leg according to claim 3, wherein the plug is provided inside the leg.   9. The holding leg according to claim 8, wherein the plug is provided at a tip of the leg portion and is pushed out from the leg portion when a cap for closing the inside of the leg portion is removed from the leg portion. body.   A first cap provided at the tip of the hollow leg and closing the inside of the hollow leg and a second cap provided at the tip of the leg and closing the inside of the leg are configured to be distinguishable from each other. The holding leg according to any one of claims 3, 4, 8 and 9, wherein the holding leg is provided.   Foldable with two hollow legs and one leg, so that the hollow legs are arranged in parallel around the legs, and the plug is covered with the hollow legs The holding leg according to claim 9, wherein the holding leg is configured as follows. In a holding leg that holds an electronic device driven by a battery,
A support base for supporting the electronic device;
A leg comprising a first leg, a second leg and a third leg connected to the support;
A charging circuit provided in the first leg,
A battery mounting portion provided on the support base and capable of mounting the battery;
A plug connected to a power source for supplying power to the charging circuit;
A holding leg characterized by comprising: In a holding leg that holds an electronic device driven by a battery,
A support base for supporting the electronic device;
At least one leg portion that is connected to the support base, includes a large-diameter hollow body and a small-diameter hollow body, and can be expanded and contracted by taking the small-diameter hollow body into and out of the large-diameter hollow body;
A battery inlet / outlet provided on a side wall of the small-diameter hollow body;
A charging circuit for charging the battery;
A plug connected to a power source for supplying power to the charging circuit;
Have
A holding leg, wherein the battery is charged in a state in which the battery is mounted inside the leg and the leg is contracted.

Images