JP2000123806A - Battery case holding mechanism and electric vehicle mounted with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily mount/demount a battery without causing a malfunction in the terminal connecting part by small force even in a large vibrational environment by rotatably installing the lever part on the battery case side surface, and pushing down the lever part long size side by making the projecting part arranged on the lever part short size side enter a battery case. SOLUTION: A battery case 1 houses a battery, has a terminal 7b in the bottom part, and rotatably supports the lever part 3 in the side part. The lever part 3 has the long size on one side and the short size on the other side to the rotational center 3c. The long size side 3a of the lever part 3 is connected to the long size side tip part of another one lever part 3 having the tip part installed on the opposite side surface of a battery case 1 to form a grip 10. The sort size side 3b of the lever part 3 has the projecting part 3d toward the tip part from the vicinity of the rotational center 3c. A battery case holder 2 has a battery case housing space 4 having a terminal 7a in the bottom part, and has in the side surface wall part a projecting part housing space 5 into which the projecting part 3d of the battery case 1 enters. Thus, the battery case 1 is pushed in the battery case holder 2 in the principle of a lever.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery case holding mechanism and an electric vehicle equipped with the same.

[0002]

2. Description of the Related Art Conventionally, various mechanisms have been considered as a battery case holding mechanism. One example is shown in FIG.

In FIG. 11, reference numeral 11 denotes a battery case containing a battery, and a handle 10 for carrying the battery is provided at an upper portion thereof.
In this case, since it is also used as a charger, it has a terminal 7b at the bottom for connecting to a control circuit. The side portion is provided with a concave portion 8b for engaging with a lock claw 8a for holding the battery case holder so that the lock claw does not come off, and a lock release bar 9 for releasing lock. The lock release rod 9 has one end 9a slightly smaller than the recess 8b, and presses the tip 9b projecting toward the handle while being pressed upward by the spring B, so that the tip 9a is recessed. 8b so as to slide freely.

A battery case holder 22 has a battery case storage space 41 and terminals 7a connected to a control circuit therein.
And a lock claw 8a pressed against the battery case storage space 41 by the spring A.

With the above configuration, when the battery case 11 is inserted into the battery case storage space 41, the lock claw 8a
Is pushed into the inside once by being pushed by the side wall of the battery case 11, and is further deeply inserted to face the recess 8 b and pushed out by the spring A to be locked. At this time, the terminals 7A and 7B are simultaneously connected. When the battery case 11 is removed from the battery case holder 22, the lock claw 8a is pushed in by pushing the lock release rod 9 to unlock the battery case, and in this state, the handle is pulled upward to connect the terminals 7a and 7b. The battery case 11 can be pulled out and pulled out.

[0006]

The conventional battery case holding mechanism as described above has a disadvantage that when the pulling force of the terminals 7a and 7b is large, a large force is required to pull out the battery case 11. On the other hand, when it is necessary to withstand large vibrations and relay a large current, such as when mounted on an electric vehicle, the terminal pulling force must be large in order to increase the terminal coupling pressure and ensure reliability. Becomes In such a case, attaching and detaching the battery case to and from the battery case holder is an extremely difficult task for a person with weak arm, such as a woman, a child, an elderly person, or a sick person.

The present invention is directed to a battery case holding mechanism which is mounted on an electric device, for example, an electric wheelchair, an electric bicycle, or another electric vehicle, which is used by people with weak arms in an environment where vibration is large. An object of the present invention is to enable reliable attachment and detachment with a small force even when a large terminal pulling force is required.

[0008]

SUMMARY OF THE INVENTION In order to solve this problem, according to the present invention, a rod is rotatably mounted on the side of a battery case, and one of the rods is longer than the center of rotation, and the other is shorter. When the battery case is inserted into the battery case holder, the protrusion provided on the short side of the rod enters the protrusion storage space provided on the battery case holder, and the long side of the rod is manually inserted. When the battery case is removed from the charger, pull up the long rod side to remove the battery case from the charger. The terminal is pulled out by generating a force based on the principle of leverage between the terminal and the projection storage space wall.

Thus, a battery case holding mechanism that does not cause a problem in the terminal connection portion even when used in an environment with large vibration and can be easily attached and detached with a small force can be obtained.

[0010]

DETAILED DESCRIPTION OF THE INVENTION The invention according to claim 1 of the present invention is a battery case holding mechanism comprising a battery case containing a battery and a battery case holder for accommodating the battery case. Has a rod portion rotatably attached to the side surface, the rod portion has one side longer than the rotation center and the other side shorter, and the shorter side from the vicinity of the rotation center. Is a protrusion protruding at least to one of the rod thickness, the battery case holder has a battery case storage space having an opening for inserting the battery case, and when inserting the battery case, A projecting portion receiving space for receiving and guiding and holding the projecting portion, the entrance of the projecting portion receiving space has a shape in which the battery case insertion direction side is recessed, and has a convex portion that narrows the entrance. The rear side of the protrusion is a protrusion front end storage space that is stored with a slight gap at the protrusion front end. The rear wall of the protrusion front end storage space is in a state where the protrusion front end is stored. The guide portion A has a shape that is inside the rotation trajectory when it is assumed that the rod portion is rotated by the guide portion A. Further, the guide portion B that is continuous with the guide portion A and that is inclined in the battery case insertion direction side protrudes. It is provided toward the anti-battery case insertion side of the entrance of the storage space, and the projection provided on the short side of the rod and the wall surface of the projection storage space are brought into contact with each other as a fulcrum, and the rotation center of the rod is There is an effect that a force based on the principle of leverage is generated with the point of action and the long side of the rod portion as the point of force.

According to a second aspect of the present invention, there is provided the battery case holding mechanism according to the first aspect, wherein the locking portion A provided on the long side of the rod portion and the locking portion provided on the battery case or the battery case holder. The part B engages with the battery case housed in the battery case holder, and has an effect that the rod case is fixed in the locked state, so that the battery case can be more securely held.

According to a third aspect of the present invention, there is provided the battery case holding mechanism according to the second aspect, wherein both the locking portions A and B are magnets, or one of the magnets is a magnet and the other is a combination of ferromagnetic materials. This has the effect that engagement can be achieved without mechanical contact by magnetic attraction.

According to a fourth aspect of the present invention, there is provided the battery case holding mechanism according to the second aspect, wherein the locking portions A and B are formed of hook-and-loop fasteners, and can be easily attached. It has the effect that a strong bond is also possible.

According to a fifth aspect of the present invention, there is provided the battery case holding mechanism according to the second aspect, wherein the locking portions A and B are both convex portions, or one of the concave portions and the other is a combination of convex portions. And has the effect of being implemented with little expense.

[0015] The invention according to claim 6 is the invention according to claims 1, 2,
An electric vehicle equipped with the battery case holding mechanism described in 3, 4, or 5, which is robust, has high reliability, and has an effect that the battery case can be easily attached and detached with a small force.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described below with reference to FIGS. 1 to 10 and FIG.

(Embodiment 1) FIG. 1 is a perspective view showing a battery case holding mechanism according to an embodiment of the present invention, and FIGS. 2 to 5 show movements of respective components when the battery case is mounted on a charger. 5 to 10 are views showing the movement of each component when the battery case is removed from the charger.

In FIG. 1, a battery case 1 stores a battery, has a terminal 7b at the bottom, and instructs a rod 3 on a side surface to be rotatable. One of the rods 3 is long and the other is short with respect to the rotation center 3c. Long side 3a of rod 3
The handle 10 has a tip connected to a long-side tip of another rod 3 attached to the opposite side surface of the battery case 1.
Is formed. The short side 3b of the rod 3 has a protrusion 3d from the vicinity of the center of rotation 3c toward the distal end. The battery case holder 2 has a battery case storage space 4 having a terminal 7a at the bottom, and a protrusion storage space 5 into which the protrusion 3d can enter when the battery case 1 is inserted is provided on a side wall. Provided.

FIG. 2 shows a battery case 1 with a battery case holder 2.
This shows the state when insertion into the device has begun. In FIG. 2, 5a is a protrusion A provided at a position retracted at the entrance of the protrusion storage space, 5b is a protrusion tip storage space provided adjacent to the protrusion A 5a, and 5c is a protrusion tip storage space 5b.
The guide portions A and 5d provided continuously with the guide portion B are guide portions B provided continuously with the guide portion A. In this state, the terminal has not been pushed yet, and no special force is required.

FIG. 3 shows a state where the battery case 1 is further inserted into the battery case holder 2 with respect to the state of FIG. Since the terminals 7a and 7b have begun to come into contact with each other, a large force is required for further insertion. On the other hand, when the long side 3a of the rod part 3 is pushed down as shown in the figure, the protruding part 3d contacts the convex part A 5a to form a fulcrum, and applies a small force Fr to the long side 3a. As a result, a large force Fs of (L1 + L2) / L1 times Fr is generated at the rotation center 3c. Thus, even when a large terminal pushing force is required, the terminal can be easily inserted.

FIG. 4 is a view showing a state where the long side 3a of the rod portion 3 is further depressed with respect to the state of FIG. At this time, since the battery case is in a slightly inclined state in which a part of the bottom portion is in contact with the bottom of the battery case storage portion of the battery case holder 2, when the long side 3a of the rod portion 3 is further pushed down. Due to the horizontal component force of Fs, the battery case 1 is pushed toward the depth in the horizontal direction of the battery case storage space. Also in this case, the small force Fr is amplified by (L1 + L2) / L1 times by the principle of leverage, and the horizontal component force Fsx = Fs * COSθ pushes the battery case 1 in the horizontal direction.

FIG. 5 is a view showing a state where the long side 3a of the rod 3 is further pushed down from the state of FIG. 4 until it stops. The battery case 1 is in the correct mounting position, and the terminals 7a and 7b are firmly joined. In addition, the protrusion tip 3e is stuck in the protrusion tip storage space. When the battery case 1 is pulled upward in this state, the battery case 1 does not move because the protrusion tip 3e is in contact with the protrusion tip storage space. Further, even when the battery case 1 is pulled out forward (to the left in the drawing) by a large force Ft, a small Fu = L1 / (L1 + L2) is provided between the locking portions 1a and 3f due to the leverage. Since only a force is generated, a simple locking portion can sufficiently function. Conversely, when the long side 3a of the rod portion 3 is pulled up with a small force Fu, a large force Ft acts on the battery case 1 and the battery case 1 can be easily pulled out forward. Thereafter, when the rod long side 3a is further lifted, the protruding tip 3e becomes the guide A.
The guide portion A has a shape that is inside the locus 6 drawn by the tip of the projection when assuming that the rod 3 is rotated about 3c, so that the projection is The tip 3e pushes the guide portion A, and the reaction force causes the tip 3c to be pushed forward (to the left in the drawing). This situation is shown in FIGS.

FIG. 8 shows a state in which the rod long side 3a is further pulled up, and the tip 3e of the projecting portion is inclined upward to the guide portion B provided toward the entrance of the projecting portion storage space 5. Since the vicinity of the center of rotation of the protruding portion contacts the surface on the entrance side of the protruding portion A5a, the protruding portion does not move even when a force is applied inward (right side in the drawing). By moving the side 3a further counterclockwise, the battery case 1 is pulled up. This situation is shown in FIGS.

As described above, the battery case 1 can be easily attached to and detached from the battery case holder 2 even when the terminal has a large push-in / pull-out strength.

In the case of this embodiment, the locking portion A on the long side of the rod portion and the locking portion B on the battery case side are both convex portions, and when the battery case is mounted on the battery case holder, The locking portion A on the long side of the rod portion to be returned hits the locking portion B so that it does not return any more. However, even if the locking portion A and the locking portion B are magnets of different polarity and are held by the attraction force, Similar effects can be obtained. Further, the locking portion A and the locking portion B may have the same polarity to prevent the locking portion A from moving to the falling side by using a repulsive force, or may be provided on either the handle portion or the front surface of the battery case. The same effect can be obtained by attaching a magnet and attaching a ferromagnetic iron plate to the other. Alternatively, it is also possible to prevent the rod portion from returning by attaching and pressing a hook-and-loop fastener on the handle portion and the front surface of the battery case corresponding to the handle portion.

(Embodiment 2) FIG. 12 is a perspective view of an electric wheelchair equipped with a battery case holding mechanism according to another embodiment of the present invention.

In FIG. 12, 1 is a battery case and 2 is a battery case holder. 2a is a charger. The battery case holder 2 is fixedly mounted on the electric wheelchair body,
The battery case 1 is held. Normally, the vehicle is run and charged with the battery case and battery case holder mounted on the electric wheelchair as shown in the figure, but it is inconvenient that the wheelchair cannot be used during the charging time, so prepare a separate battery case. In some cases, the battery charged by another charger is replaced and used. In such a case, the attachment and detachment of the battery case 1 to and from the battery case holder and the charger are frequently performed, and the operation is performed by mounting the battery case holding mechanism of the present invention on both the battery case holder and the charger. It is possible to greatly reduce the burden on the person.

[0028]

As described above, according to the first aspect of the present invention, by applying the principle of leverage and moving the long side of the rod with a small force, a large force is generated on the short side of the rod. Since the battery case is pushed into the battery case holder, the battery case can be easily attached even when a terminal having a large pushing / pulling force is used.

According to the second aspect of the present invention, the locking portion is provided between the rod long side and the battery case or the battery case holder in a state where the battery case is mounted on the battery case holder. The battery case can be reliably held.

According to the third aspect of the present invention, since the engagement between the rod long side and the battery case or the battery case holder is performed by using the magnet, the joint portion is not mechanically rubbed, so that the durability is ensured. High performance.

According to the fourth aspect of the present invention, the connection between the rod long side and the battery case or the battery case holder is performed using the hook-and-loop fastener. .

According to the fifth aspect of the present invention, since the engagement between the rod long side and the battery case or the battery case holder is performed by using the unevenness, the engagement portion can be easily formed, so that the cost is low. Products can be made.

According to the sixth aspect of the present invention, by mounting the battery case holding mechanism of the present invention on an electric vehicle such as an electric wheelchair, it is possible to provide a highly reliable electric vehicle without imposing a burden on an operator. It becomes possible.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a battery case holding mechanism according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a state when a battery case is started to be inserted into a battery case holder;

FIG. 3 is a diagram showing a state when a battery case is further inserted into a battery case holder.

FIG. 4 is a diagram showing a state when the long side of the rod portion is further pushed down.

FIG. 5 is a diagram showing a state where the long side of the rod portion is further pushed down until it stops.

FIG. 6 is a diagram showing a state in which the long side of the rod has begun to be pulled up;

FIG. 7 is a view showing a state in which the long side of the rod portion is further raised.

FIG. 8 is a diagram showing a state in which the long side of the rod portion is further raised.

FIG. 9 is a diagram showing a state in which the long side of the rod portion is further raised.

FIG. 10 is a view showing a state where the battery case is detached from the battery case holder.

FIG. 11 is a sectional view showing a conventional battery case holding mechanism.

FIG. 12 is a diagram showing an electric vehicle according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Battery case 1a Locking part B 2 Battery case holder 3 Rod part 3a Long side of rod part 3b Short side of rod part 3c Rotation center of rod part 3d Projecting part 3e Projecting part tip 3f Locking part A 4 Battery case Storage space 5 Projection storage space 5a Projection A 5b Projection tip storage space 5c Guide part 1 5d Guide part 26 Assumed rotation locus of protrusion tip 7a, 7b Terminal 8a Lock claw 8b Depression 9 Lock release rod 10 Handle

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Yukihiro Ashizaki 1006 Kazuma Kadoma, Osaka Pref. Matsushita Electric Industrial Co., Ltd. (72) Koji Kamada 1006 Kadoma Kadoma Kadoma, Osaka Pref. Matsushita Electric Industrial Co., Ltd. Terms (Reference) 3D035 AA00 BA02 5H115 PG06 PI16 UI40

Claims (6)

[Claims] 1. A battery case holding mechanism comprising: a battery case containing a battery; and a battery case holder accommodating the battery case, wherein the battery case has a rod rotatably attached to a side surface. The rod portion has one long side and the other side short with respect to the center of rotation, and the short side protrudes from the vicinity of the center of rotation with at least one of the rod thicknesses. The battery case holder has an opening for inserting the battery case, and a projecting portion storage space for receiving, guiding, and holding the projecting portion when inserting the battery case. The entrance of the projecting portion storage space has a shape in which the battery case insertion direction side is receded, and has a convex portion A that narrows the entrance, and the rear side of the projecting portion has the projecting portion. Destination The end is a protrusion tip storage space in which the end is stored with a slight gap.The wall on the back side of the protrusion tip storage space assumes that the rod is rotated with the protrusion tip stored. A guide portion A having a shape inside the rotation locus is formed, and a guide portion B which is continuous with the guide portion A and is inclined in the battery case insertion direction side is provided on the opposite side of the battery case insertion side of the entrance of the protrusion storage space. A battery case holding mechanism, which is provided toward the battery case. 2. The battery case holding mechanism according to claim 1, wherein the locking portion A provided on the long side of the rod portion and the locking portion B provided on the battery case or the battery case holder comprise a battery. A battery case holding mechanism, wherein the case is engaged with the case stored in a battery case holder. 3. The battery case holding mechanism according to claim 2, wherein both the locking portions A and B are made of a magnet, or one of the magnets and the other is made of a ferromagnetic material. 4. The battery case holding mechanism according to claim 2, wherein the locking portions A and B are made of hook-and-loop fasteners. 5. The battery case holding mechanism according to claim 2, wherein both the locking portions A and B are formed of a combination of convex portions or one of the concave portions and the other of the convex portions. 6. An electric vehicle equipped with the battery case holding mechanism according to claim 1.