JP5448986B2 - Battery storage structure of platform scale - Google Patents

Description

  The present invention relates to a battery housing structure for a platform scale, and in particular, a battery for a platform in which a dry cell as a power source for a platform scale is accommodated in a battery storage chamber provided in a digital display supported by a support column extending upward from the platform body. It relates to a storage structure.

  As shown in Patent Document 1, the platform scale is attached to the weighing platform, a load measuring unit including an upper weighing platform with a built-in load detection mechanism, a weighing pan connected to an upper portion of the load detection mechanism, and the weighing platform. It is comprised from the support | pillar integrated and extended upwards, and the indicator supported by the said support | pillar from the downward direction.

  In general, the platform scales used in the fish market, food, pharmaceutical factories, etc. are known to have specifications that use multiple dry batteries as DC power supply, considering the case where it can be used for a long time and used in places where AC power is not supplied. .

  In addition, it is possible to provide a DC power supply in the main body of the platform, but considering the fact that it is easy to replace the battery and is not easily affected by moisture, a configuration in which it is provided in the display body above the main body of the platform tends to be adopted. It is in.

  For example, as shown in FIG. 9, a battery pack 6 in which a dry battery 5 is housed and integrated inside a cap 4 is fastened with a screw 7 in a battery housing chamber 3 provided on the back side of the main body case 2 of the display 1. Thus, a battery housing structure integrated with the main body case 2 is known.

JP 2002-031569 (paragraph number 0005, FIG. 1)

  However, in the structure shown in FIG. 9, in order to take out the battery pack 6 from the battery storage chamber 3, the battery pack 6 (cap 4) falls when the screw 7 is removed. Screw 7 must be removed by hand. Similarly, when the battery pack 6 is mounted in the battery storage chamber 3, it is necessary to stop the screw 7 while holding the cap 4 so that the battery pack 6 does not fall, and battery replacement is troublesome.

  In particular, the digital display 1 is used by tilting the back side so that the display surface faces upward so that the user who is working can easily see the measured value from above. The battery pack 6 may fall as soon as it is opened.

  The present invention has been made in view of the above-described problems of the prior art, and an object thereof is to provide a battery housing structure for a platform scale that allows easy battery replacement.

  In order to achieve the above object, in the battery storage structure of the platform balance according to claim 1, a dry battery as a power source for the platform scale is housed and integrated in a digital display for a platform supported by a column extending upward from the platform body. In the battery housing structure of the platform balance, a battery housing chamber that opens to the back side is provided in the main body case constituting the digital display, and the battery housing chamber has a side wall that defines the opening on the back side. A battery pack in which a plurality of dry batteries are housed in and integrated with the battery holder, and a battery housing structure of a platform scale in which a cap is attached to the side wall and the battery housing chamber is sealed, A spring member that repels the battery holder in a pushing direction is provided between the bottom surface of the battery storage chamber and the bottom of the battery holder. Protrudes outward from the ceiling of the holder, and the operation part is provided with a hook that is exposed to the ceiling surface of the holder, while a hook engaging part that engages the hook is provided at a predetermined position on the side wall. Configured.

  (Operation) When the battery pack is mounted in the battery storage chamber, the hook and the hook engaging portion are aligned in the circumferential direction, and the battery pack is resisted against the repulsive force of the spring member provided on the bottom surface of the battery pack. When the battery pack is pushed into the battery storage chamber, the hook pressed by the side wall is immersed in the holder ceiling, and the battery pack can be inserted into the battery storage chamber. When the hook is in a position corresponding to the hook engaging portion on the side wall, the hook (the tip) is engaged with the hook engaging portion by the biasing force of the hook biasing spring, and the battery pack is in contact with the battery storage chamber. It is held in a reliably secured form.

  On the other hand, when removing the battery pack from the battery storage chamber, if the hook operation part exposed on the ceiling surface of the battery pack is operated with a finger to disengage the hook (tip) from the hook engagement part The battery pack is pushed out of the battery storage chamber by the urging force of the spring member provided on the bottom surface of the battery holder, and the ceiling portion of the battery pack protrudes from the opening of the battery storage chamber.

  That is, as long as the hook and the hook engaging portion are aligned in the circumferential direction, the hook is automatically engaged with the hook engaging portion simply by pushing the battery pack into the battery storing chamber. On the other hand, if the hook operation part is operated with a finger to disengage the hook from the hook engaging part, the ceiling of the battery pack pushed out by the biasing force of the spring member on the bottom of the battery holder Since the battery pack can be taken out of the battery storage chamber by grasping the portion, the battery can be replaced with one hand.

  According to a second aspect of the present invention, there is provided a battery storage structure for a platform balance according to the first aspect, wherein a power supply is provided to the digital display device provided on the front side of the main body case and the platform main body at the bottom center of the battery storage chamber. The positive side and negative side power supply terminals of the battery pack are provided concentrically. On the other hand, the spring member provided on the bottom surface of the battery pack functions as a power supply side power supply terminal concentrically insulated and corresponding to the power supply terminal. A pair of large and small compression coil springs was used.

  (Operation) Since the spring member for pushing out the battery pack interposed on the bottom surface of the battery holder also serves as the power supply side power supply terminal, it is not necessary to separately provide the power supply side power supply terminal in the battery pack.

  According to a third aspect of the present invention, in the battery storage structure for the platform balance according to the first or second aspect, the hook engaging portion is provided at a position that is the uppermost portion of the side wall.

  (Action) A person has left-handed and right-handed, but when releasing the engagement between the hook and the hook engaging part, the hand that immerses the operating part of the hook against the spring bias is the right hand. Even the left hand is easy to operate.

  In Claim 4, The battery storage structure of the platform balance in any one of Claims 1-3 WHEREIN: An outward protrusion is on the ceiling part side surface predetermined position of the said battery holder, On the other hand, the opening end side predetermined position of the said side wall Is provided with a slit that can be engaged with the outer protrusion, and the outer protrusion and the slit serve as positioning means for accurately aligning the hook and the hook engaging portion.

  (Operation) When the outer protrusion on the battery pack side and the slit on the side wall on the battery storage chamber side are aligned in the circumferential direction and the battery pack is pushed into the battery storage chamber, the hook and the hook engaging portion are securely engaged. .

  As described above, according to the first aspect of the present invention, since the battery pack can be easily inserted into and removed from the battery storage chamber with one hand, battery replacement is easy.

  According to the invention of claim 2, the number of parts is reduced, and the structure of the battery holder is simplified accordingly.

  According to the third aspect of the present invention, it is easy for the right-handed person or the left-handed person to operate the hook operation unit when exchanging the batteries.

  According to the fourth aspect of the present invention, erroneous insertion of the battery pack into the battery storage chamber without the hook being engaged with the hook engaging portion is prevented, and accurate mounting of the battery pack into the battery storage chamber is prevented. Guaranteed.

It is an external appearance perspective view of the platform scale which concerns on the Example of this invention. It is a longitudinal cross-sectional view of the digital display which is the principal part. It is the perspective view which looked at the digital display of the state where the cap was removed from the back side. It is the perspective view which looked at the digital display of the state which took out the battery pack from the battery storage room from the back side. It is a top view of a battery holder. It is a perspective view of a battery holder. It is the perspective view which looked at the battery holder from the bottom side. It is a disassembled perspective view of a battery holder. It is a perspective view which shows the battery storage structure of the conventional platform scale.

  Next, embodiments of the present invention will be described based on examples.

  1 to 8 show an embodiment of the present invention, and FIG. 1 is an external perspective view of a platform balance according to the embodiment. 2 to 4 show a digital display for the same platform scale, and FIGS. 5 to 8 show a battery holder housed in the digital display.

  In these drawings, a platform scale 10 includes a weighing platform (base portion) 12 that opens upward and incorporates a load detection mechanism (not shown), a weighing pan 16 (upper pan) connected to the load detection mechanism, and a weighing platform. A platform scale body (load measuring unit) 11 including a leg (foot piece) 14 that can be adjusted in height to install the pan 16 in a horizontal state, and a side of the load measuring unit 11 that is attached to and integrated with the weighing platform 12. And a digital display 20 connected to the upper end of the column 18. A tilt position adjusting mechanism 19 is interposed between the digital display 20 and the support column 18, and the digital display 20 can be tilted back and forth with respect to the support column 18 (that is, tilt adjustment can be performed around the support shaft L). .

  The digital display 20 includes a digital display unit 20a that displays a load value and the like on the front side of the main body case 21, and a battery storage unit 20b that stores a dry cell on the back side. That is, a substrate storage chamber 22 for storing a printed circuit board (liquid crystal display device) 23c mounted with an electronic liquid crystal constituting a liquid crystal display circuit is provided on the front side in the main body case 21, and a plurality of substrates are provided on the back side. A battery storage chamber 24 for storing the dry batteries is provided, and the storage chambers 22 and 24 are separated by a standing wall 24a.

  The battery storage chamber 24 has a substantially columnar shape extending in the front-rear direction (left-right direction in FIG. 2) in the main body case 21, and is defined by a substantially cylindrical side wall 26a that opens to the back side. The battery pack 71 can be taken in and out of the battery storage chamber 24 through the opening 26 of the side wall 26a, and the battery storage chamber 24 is sealed by attaching the cap 60 to the side wall 26a.

  When the opening 26 is viewed from the front, a rectangular slit 28 (hook engagement portion) having a predetermined width in the circumferential direction, which is an engagement portion of the hook 42 (tip portion 42a) of the battery holder 40, is formed at the uppermost portion of the side wall 26a. Is provided. A male screw 31 aligned with the female screw 64 of the cap 60 is provided around the outer periphery of the side wall 26a, and an O-ring 34 for waterproofing the inside of the battery storage chamber 24 is mounted on the outer peripheral base end side of the side wall 26a. A pair of horizontal ribs 32, 32 is provided around.

  On the other hand, at the center of the bottom surface (standing wall 24 a) of the battery storage chamber 24, it is connected to the power supply side power supply terminal 51 on the battery pack 71 side stored in the battery storage chamber 24, so A metal power supply terminal 35 (an annular negative terminal 35a having a large outer diameter and a positive terminal 35b having a small inner diameter) for supplying power to the detection mechanism) is provided concentrically. . The power supply terminals 35 (35a, 35b) are exposed to the battery storage chamber 24 and the substrate storage chamber 22 and contact the power supply side power supply terminals 51 provided in the battery pack 71 on the battery storage chamber 24 side. Electric power is supplied to the platform scale body 11 through the printed circuit board 23c and the like.

  Specifically, the power supply terminals 35 (35a, 35b) exposed to the substrate storage chamber 22 side are connected to a power supply cord, connected to the liquid crystal display device drive circuit of the printed circuit board 23c via the power supply cord, It is electrically connected to the platform scale main body 11 (the load detection mechanism) via a cable 23a from the connector 23 protruding downward from the main body case 21 electrically connected to the printed circuit board 23c.

  As shown in FIG. 8, the battery holder 40 is a generally cylindrical resin product mainly composed of a ceiling portion 41, an upper case 43, and a lower case 48.

  The upper case 43 includes a substantially circular upper surface portion 43a provided with C-shaped concave portions 54 at three circumferentially equal intervals, and a central post portion 43c having a substantially hexagonal cross section extending downward from the central portion of the upper surface portion 43a. And six substantially triangular side struts 43b extending downward at equal intervals in the circumferential direction from the circumferential end of the upper surface portion 43a.

  On the lower surface side of the upper surface portion 43a, plus-side terminals 52b constituting the electrode springs 52 are provided at three locations near the C-shaped recess 54, and minus-side terminals constituting the springs are provided at the other three circumferential portions. 52a is laid so as to be continuously arranged in the circumferential direction.

  The ceiling portion 41 is a substantially disc-shaped resin body having the same shape as the upper surface portion 43a (provided with the C-shaped concave portion 54), and is screwed to the upper surface portion 43a of the upper case 43. As shown, a concave groove 41b extending in the radial direction is provided at a predetermined position in the circumferential direction near the lower circumferential end of the ceiling portion 41, and a hook accommodating chamber 41c is defined by the concave groove 41b and the upper surface portion 43a. In addition, a rectangular opening 41a for exposing the hook operation portion 42b to the ceiling portion 41 is provided at a substantially central portion in the radial direction of the accommodation room.

  The hook accommodating room 41c accommodates a hook 42 with the hook operating portion 42b exposed from an opening 41a provided in the ceiling portion 41 so as to be slidable in the radial direction. The hook 42 is compressed by a compression coil spring 42c. The front end portion 42a is biased and held in a form protruding outward from the ceiling portion 41.

  The front end portion 42a has a triangular cross section, and when the battery pack 71 is pushed into the battery storage chamber 24, the lower surface side when the battery pack 71 is assembled into the battery holder 40 (see FIG. 2) interferes with the end portion of the side wall 26a in the hook insertion direction. Since the force is received, the tip end portion 42a is easily immersed in the hook accommodating room 41c.

  Then, if the hook operation portion 42b locked at the edge of the opening portion 41a is pushed downward in FIG. 2 against the urging force of the compression coil spring 42c, the tip end portion 42a is immersed in the hook accommodating chamber 41c. To do.

  On the other hand, a semicircular arc-shaped wire material that follows the outer shape of the side surface of the battery holder 40 is formed on the circumferential portion on the side opposite to the side on which the hook 42 is provided (the lower side in FIG. 5). An internal handle 46 is attached and integrated. The handle 46 is stored along the outer periphery of the ceiling portion 41 when the battery pack 71 is mounted in the battery storage chamber 24, and the half-arc apex portion of the handle 46 when the battery pack 71 is removed from the battery storage chamber 24. Is lifted up toward the top of the ceiling 41 (forward in FIG. 5).

  The lower case 48 includes a lower surface portion 48a having the same shape as the upper surface portion 43a and six substantially triangular side column portions extending upward from the circumferential end portion of the lower surface portion and paired with the side column portions 43b. 48b.

  Two electrode springs 52 are laid on the upper surface side of the lower surface portion 48a in the same manner as the upper surface portion 43a, and a negative terminal 52A is laid on the electrode spring 52 (plus terminal 52b) in the circumferential direction. Subsequent to the terminal 52A, a plus-side terminal 52B that constitutes an electrode spring 53 integrally with a power supply-side power supply terminal 51b to be described later is laid with its wire portion fixedly held in the wire groove 50 of the lower surface portion 48a.

  At the center of the lower surface portion 48a of the lower case 48, an annular outer terminal housing chamber 49a (for the negative terminal) separated by a cylindrical insulating partition, and an inner terminal (for the positive terminal) ) A terminal accommodating chamber 49b is formed. A compression coil spring 51a having a large diameter is fixedly held from the lower surface side of the lower surface portion 48a in the terminal storage chamber 49a, and a compression coil spring 51b having a small diameter is stored in the terminal storage chamber 49b on the upper surface side of the lower surface portion 48a. Since the compression coil springs 51a and 51b are concentrically insulated from each other (in the wire groove 50), the compression coil springs 51a are arranged in a concentric manner, and the compression coil springs 51a are laid on the lower surface portion 48a. And the compression coil spring 51b is integrated with the positive terminal 52B (electrode spring 53), and thus becomes a positive power supply terminal.

  When the battery pack 71 is stored in the battery storage chamber 24, the compression coil springs 51a and 51b that also serve as the power supply terminal are respectively connected to the negative power supply terminal 35a provided on the bottom surface of the battery storage chamber 24 and the positive power supply. Contact the terminal 35b.

  The compression coil springs 51 a and 51 b are both partially protruded from the lower surface 48 a (terminal housing chambers 49 a and 49 b) of the lower case 48, and repel when the battery pack 71 is pushed into the battery housing chamber 24. The ceiling 41 of the battery pack 71 protrudes from the opening 26.

  If the upper case 43 and the lower case 48 are assembled so that the C-shaped concave portions 54 of the upper surface portion 43a and the lower surface portion 48a are displaced in the circumferential direction (the end portions of the side column portions 43b and 48b are fitted together). The battery holder 40, and the single dry batteries 70 are arranged in an arc shape (in parallel) between the side support portions 43b, 48b and the center support portion 43c (with the positive electrode side facing the C-shaped recess 54). If 6 pieces are stored, the battery pack 71 is obtained by connecting six single dry batteries in series.

  In addition, since a part of the positive side surface of the dry battery 70 is exposed from the C-shaped concave portion 54 of the battery pack 71, the dry battery 70 can be easily detached from the battery holder 40 by being easily put on the dry battery 70.

  The cap 60 is a flat cylindrical resin molded body having a substantially U-shaped vertical cross section that is attached to the side wall 26 a of the battery storage chamber 24. A female screw 64 that aligns with the male screw 31 of the side wall 26a that defines the battery storage chamber 24 is provided around the inner periphery of the side wall 66 of the cap 60. Are provided at equal pitches in the circumferential direction. When the fingers 60 are put on the side walls 26a and the cap 60 is rotated in the circumferential direction, the female screw 64 and the male screw 31 are screwed together. Thus, the cap 60 can be attached to the side wall 26 a of the battery storage chamber 24.

  When the battery pack 71 is mounted in the battery storage chamber 24, first, the battery pack 71 is held with one hand, and the hook 42 of the battery pack 71 and the slit 28 of the battery storage chamber 24 are positioned in the circumferential direction. In addition, the battery pack 71 is inserted into the battery storage chamber 24, and further, the battery pack is resisted against the repulsive force of the compression coil spring 51 provided on the lower surface portion 48a (terminal storage chambers 49a, 49b) of the battery pack 71. 71 is pushed into the battery storage chamber 24. Then, the hook 42 (tip portion 42 a) is pushed into the ceiling 41 (hook receiving chamber 41 c) of the battery pack 71 by being pushed by the circumferential end of the side wall 26 a, and the battery pack 71 enters the battery storing chamber 24. Can be inserted.

  Next, when the battery pack 71 is inserted to a position where the hook 42 corresponds to the slit 28 of the side wall 26 a, the hook 42 (tip portion 42 a) protrudes outward again by the urging force of the compression coil spring 42 c, and enters the slit 28. The battery pack 71 is securely held against the battery storage chamber 24 by being engaged.

  That is, as long as the hook 42 and the slit 28 are aligned in the circumferential direction, the battery pack 71 is simply pushed into the battery storage chamber 24, so that the battery pack 71 can be inserted with one hand. In addition, the hook 42 (tip portion 42a) is automatically engaged with the slit 28 by being urged by the compression coil spring 42c, so that the battery pack 71 can be easily mounted in the battery storage chamber 24.

  Next, when the cap 60 is put on the side wall 26a and rotated in the circumferential direction, the female screw 64 and the male screw 31 are screwed together, and the battery storage chamber 24 is sealed. At this time, unlike the conventional cap 4, the cap 60 is not attached to the back side of the main body case with the screw 7 as a separate member, but the cap 60 itself is a female screw 64. Therefore, the cap 60 is simply rotated in the circumferential direction. It can be fixed with.

  Further, the finger hooking recess 62 provided on the side wall 66 of the cap 60 provides good finger contact when the cap 60 is rotated in the circumferential direction, and can be rotated without difficulty in the circumferential direction. is there.

  On the other hand, when taking out the battery pack 71 from the battery storage chamber 24, first, the cap 60 is rotated in the circumferential direction with one hand, and the cap 60 is removed from the main body case 21 (side wall 26a).

  In particular, since the digital display device 20 is usually used tilted backward, in the conventional battery housing structure (see FIG. 9), if the cap 4 is not held with the other hand, the instantaneous battery when the cap 4 is opened. Although there is a possibility that the pack 6 slides down from the battery storage chamber 3, in this embodiment, the battery pack 71 is held in the battery storage chamber 24 by the hook 42 and the slit 28, so there is no possibility of this.

  Next, the main body of the battery pack 71 is stored in the battery storage chamber 24, and only the ceiling portion 41 (the upper surface side thereof) is exposed flush with the opening 26 (the circumferential end portion of the side wall 26a).

  Therefore, the hook operation part 42b exposed from the ceiling part 41 is picked, and the hook 42 is pushed down in the direction in which the tip part 42a of the hook 42 is immersed (downward in FIG. 2), and the hook 42 (tip part 42a) and When the engagement with the slit 28 is released, the battery pack 71 is pushed out of the battery storage chamber 24 by the urging force of the compression coil spring 51 interposed in the lower surface portion 48a (terminal storage chambers 49a, 49b) of the battery pack 71. The ceiling portion 41 of the battery pack 71 protrudes from the opening portion 26 (circumferential end portion of the side wall 26a) of the battery storage chamber 24.

  Next, the handle 46 accommodated along the outer periphery of the ceiling part 41 is pushed up and raised above the ceiling part 41 (forward direction in FIG. 5), and the handle 46 is used by using another finger or the like of the hand in which the hook 42 is immersed. Can be taken out from the battery storage chamber 24 by pulling in the direction toward the back side of the main body case 21.

  That is, the cap 60 is opened, the hook operation part 42b is pushed down, the battery pack 71 is prevented from coming off (engagement between the hook 42 and the slit 28), the handle 46 is grasped with its hand, and the battery pack 71 is pulled out. The battery pack 71 can be taken out with one hand. In addition, when the engagement between the hook 42 and the slit 28 is released, the ceiling 41 of the battery pack 71 is automatically protruded from the battery storage chamber 24 by being urged by the compression coil spring 51, so that the handle 46 can be easily grasped. The battery pack 71 can be easily removed from the battery storage chamber 24.

  Further, a separate spring member may be provided on the lower surface side of the lower surface portion 48a of the battery holder 40, and the compression coil spring 51 may function only as a power supply terminal, but the compression coil spring 51 also serves as a power supply terminal. Since the power supply terminal on the battery pack 71 side is omitted and the number of parts is reduced, the structure of the battery holder 40 is simplified accordingly.

  Further, the slit 28 which is the engaging portion of the hook 42 may be provided at any position in the circumferential direction of the side wall 26a. However, if the slit 28 is provided at the top of the side wall 26a when the opening 26 is viewed from the front. It is easy for both right-handed and left-handed people to pick the hook operation part 42b, and it is easy to use when replacing the battery.

  When the battery pack 71 is pushed into the battery housing chamber 24 without aligning the hook 42 and the slit 28 in the circumferential direction, the hook 42 of the battery holder 40 protrudes outward by the urging force of the compression coil spring 42c. For this reason, the tip end portion 42a is immersed in the ceiling portion 41 regardless of the location of the circumferential end portion of the opening 26, and the battery pack 71 is moved into the battery storage chamber 24 without the hook 42 and the slit 28 being engaged. There is a risk of insertion (incorrect insertion).

  In order to prevent this, in the present embodiment, a rectangular protrusion 44 is formed on the side of the battery holder 40 (upper case 43) on the side of the ceiling 41 at a position of 90 ° clockwise from the hook 42 along the outer periphery of the ceiling 41. Projecting outwardly from the battery holder 40, and on the other hand, at the circumferential end of the side wall 26a of the battery storage chamber 24, a projection 44 is formed at 90 ° clockwise from the slit 28 along the circumference of the side wall 26a. A notch 30 (vertical slit) is engageable.

  When the protrusion 44 and the notch 30 are aligned and engaged in the circumferential direction, the hook 41 and the slit 28 are surely aligned in the circumferential direction at a position of 90 ° counterclockwise along the circumference of the side wall 26a from the engagement point. Therefore, the hook 41 and the slit 28 can be accurately aligned.

  That is, when the battery pack 71 is mounted in the battery storage chamber 24, the hook 41 and the slit 28 can be securely connected by pressing the battery pack 71 into the battery storage chamber 24 with the protrusions 44 and the notches 30 aligned in the circumferential direction. Since they are engaged, the erroneous insertion is prevented, and accurate mounting of the battery pack 71 (into the battery storage chamber 24) is ensured.

  Since the protrusion 44 and the notch 30 are positioning means for aligning the hook 42 and the slit 28 in the circumferential direction, as long as the alignment is accurate, the side surface circumferential direction of the battery pack 71, the battery storage You may provide in the position of the circumferential end part circumferential direction of the side wall 26a of the chamber 24 (Claim 4).

  In addition, a sheet packing 33 is provided around the side wall 26 a of the battery storage chamber 24 between the base end portion of the side wall 26 a and the horizontal rib 32 on the base end side, and an O between the pair of horizontal ribs 32, 32 is provided. A ring 34 (ring-shaped elastic body) is provided around.

  When the female screw 64 of the cap 60 and the male screw 31 of the side wall 26a of the battery storage chamber 24 are screwed together (the cap 60 is closed), the O-ring 34 is compressed in the gap depth direction between the pair of horizontal ribs 32, 32, Since the sheet packing 33 is also pressed toward the base end side of the side wall 26a, the gap between the cap 60 and the side wall 26a is reliably closed and sealed, and the waterproof property of the battery storage chamber 24 is ensured.

  If the protrusion 44 is not engaged with the notch 30, the protrusion 44 is locked at the circumferential end of the side wall 26a, and the battery pack 71 is not accommodated in the battery storage chamber 24 and the opening 26a (circumference of the opening 26a). Protruding from the end). For this reason, even if the cap 60 is to be closed, the protrusion prevents the female screw 64 and the male screw 31 from aligning, and the cap 60 does not close.

  That is, even when the cap 60 is opened at the time of battery replacement and the sealing property of the battery storage chamber 24 is once released, in order to insert the battery pack 71 into the battery storage chamber 24 again, the protrusions 44 and the notches 30 need to be aligned. Therefore, both the protrusions 44 and the notches 30 are always engaged. If the protrusion 44 and the notch 30 coincide with each other, first, the hook 42 and the slit 28 are securely engaged, and secondly, the battery pack 71 is accommodated in the battery storage chamber 24 and the chamber 60 is sealed with the cap 60. As a result, the battery pack 71 can be prevented from coming off and the battery storage chamber 24 can be waterproofed even after battery replacement.

  In the above-described embodiment, the shape of the battery storage chamber 24 (the inner peripheral shape of the side wall 26a), that is, the shape of the opening 26 is described as a columnar (cylindrical) shape. Also good.

  The present invention can be widely applied to a platform scale, a weight scale and other scales having a digital display supported above by a support column.

DESCRIPTION OF SYMBOLS 10 Scale 11 Base scale body 18 Support | pillar 20 Base display digital display 21 Main body case 24 Battery storage chamber 26 Opening part 26a Side wall 28 Slit 30 Notch 35 Feed terminal 40 Battery holder 41 Ceiling part 42 which comprises a battery holder Hook 42b Hook operation part 42c Compression coil spring 43 Upper case 44 constituting the battery holder Projection 48 Lower case 51 constituting the battery holder Compression coil spring 60 Cap 70 Dry battery 71 as a power source Battery pack

Claims (4)

In the battery storage structure of the base balance in which the dry battery which is the power source for the base scale is stored and integrated in the digital display for the base scale supported by the column extending upward from the base body,
In the main body case constituting the digital display, a battery storage chamber that opens to the back side is provided,
In the battery storage chamber, a battery pack in which a plurality of dry batteries are stored and integrated in a battery holder can be taken in and out through a side wall that defines the opening on the back side.
A battery storage structure of a platform scale in which a cap is attached to the side wall and the battery storage chamber is sealed,
On the bottom surface of the battery holder, a spring member is provided that repels the battery holder in the pushing direction between the bottom surface of the battery storage chamber,
The ceiling of the battery holder is spring-biased so that its tip protrudes outward from the ceiling of the holder, and a hook is provided that exposes the operation part to the ceiling of the holder.
On the other hand, a battery housing structure for a platform scale, wherein a hook engaging portion with which the hook is engaged is provided at a predetermined position on the side wall. A digital display device provided on the front side of the main body case and a power supply terminal on the positive side and the negative side for supplying power to the platform scale body are provided concentrically at the center of the bottom surface of the battery storage chamber,
On the other hand, the spring member provided on the bottom surface of the battery pack is composed of a pair of large and small compression coil springs that function as power supply side power supply terminals arranged in a concentric manner corresponding to the power supply terminals. The battery storage structure of the platform scale according to claim 1 .
  The battery housing structure for a platform scale according to claim 1, wherein the hook engaging portion is provided at a position that is an uppermost portion of the side wall.   An outward projection is provided at a predetermined position on the side of the ceiling of the battery holder, and a slit that can be engaged with the outward projection is provided at a predetermined position on the opening end side of the side wall. The battery housing structure for a platform scale according to any one of claims 1 to 3, wherein positioning means for accurately aligning the hook and the hook engaging portion is configured.

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