JPH0418621A - Memory card - Google Patents

Abstract

PURPOSE:To prevent a planar electrode from being deformed or destroyed by providing a buffering material on the opposite face of a face in contact with a battery in the planar electrode and absorbing impulse to be received with the planar electrode in the case of mounting the battery by this buffering material. CONSTITUTION:A positive battery electrode 18 equipped with an electrode plate 18a is composed of the spring material of phosphorous bronze or the like. Therefore, when a battery holder 17 is mounted into a memory card, the plate 18a is pressed and backed on the peripheral face of a battery 16. Consequently, the plate 18 is elastically brought into contact with the peripheral face of the battery 16. On the opposite face of the face in contact with the peripheral face of the battery 16 in the plate 18a, a cushion material 19 of urethane rubber or the like is attached. This material 19 plays the role for reinforcing the plate 18a itself or stabilizing the contact between the plate 18a and the battery 16. Namely, this material 19 can partially absorb the impulse to be received in the plate 18a in the case of inserting the holder 17, thus, the plate 18a can be prevented from being deformed or destroyed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Purpose of the Invention (Field of Industrial Application) The present invention relates to an IC card, and more particularly to a memory card having a removably built-in battery for backup power supply.

(Prior Art) In recent years, systems using IC cards have become widespread in the service management of various institutions such as banks and hospitals, and there is also a tendency for IC cards to be used widely as recording media for electronic still cameras.

An IC card, particularly a memory card, basically includes a memory element and a control IC that performs various controls such as writing and reading data to the memory element. As the memory element, S (static) RAMSD (dynamic) RAM, etc. are used due to its characteristics. Therefore, in order to retain information in such memory elements, it is necessary to have a power backup battery in the memory card. In general, batteries for this backup power source include manganese, alkaline manganese, iron oxide,
Materials based on lithium, etc. are used.

By the way, in such a memory card that requires a battery for backup power supply, it is necessary to replace the battery as the battery wears out, so the following configuration is adopted to facilitate this battery replacement.

FIG. 2 is a plan view showing the structure of a conventional memory card, particularly the structure of a portion related to a battery for backup power supply.

In the figure, 1 indicates a memory card cabinet (frame). Two exterior reinforcing plates 2 facing each other with the cabinet 1 in between are adhered to each other. Further, a circuit board 3 is supported in this cabinet 1, and on this circuit board 3, a plurality of memory elements 4 and various controls such as data writing and reading for these memory elements 4 are carried out. IC (not shown)
, and a power supply electrode land 5 and the like are mounted. Further, a battery holder 7 that holds a battery 6 for backup power supply is removably housed in this memory card. Further, 8 is a battery positive electrode electrically connected to the battery 6 held in the battery holder 7. This battery positive electrode 8 is configured with an electrode plate 8a having a spring property that directly contacts the circumferential surface of the battery 6 at one end thereof, and the other end is electrically connected to the above-mentioned power supply electrode land 5. There is. Also,
Conductor wiring (
The ground terminal of each memory element 4 is connected to a battery negative electrode (not shown) in contact with the bottom surface of the battery 6 through conductor wiring.

By the way, the battery positive electrode 8 including the above-mentioned electrode plate 8a is made of a spring material such as phosphor bronze. Therefore, when the battery holder 7 is not attached to the memory card, the electrode plate 8a of the battery positive electrode 8 is in the position shown by the dotted line in the figure, and when the battery holder 7 is attached, the electrode plate 8a is in the position shown by the dotted line in the figure. As a result, the electrode plate 8a comes into elastic contact with the circumferential surface of the battery 6.

However, the electrode plate 8a of the battery positive electrode 8 may be deformed due to, for example, a shock received when the battery holder 7 is inserted, or by accidentally inserting the battery holder 7 in the opposite direction. There is a risk that the battery 6 may be damaged or damaged, and as a result, there is a problem that the contact state with the battery 6 deteriorates.

As a countermeasure, it is possible to increase the strength and rigidity of the battery positive electrode 8 itself. However, increasing the strength and rigidity of the battery positive electrode 8 requires reinforcement of the gear vignette part that supports it, which causes the memory card This causes a decrease in the packaging density.

(Problems to be Solved by the Invention) As described above, in conventional memory cards, there is a risk that the electrodes that come into contact with the battery for backup power supply may be deformed or damaged.

The present invention has been made to solve these problems, and aims to provide a memory card that can effectively prevent deformation and damage of plate electrodes that come into contact with a battery for backup power supply.

[Structure of the Invention (Means for Solving the Problems)] In order to achieve the above object, the memory card of the present invention has a built-in battery for backup power supply in a removable state, and is elastically in contact with the battery. The memory card is characterized in that a buffer material is attached to the surface of the plate-shaped electrode opposite to the surface that contacts the battery.

(Function) In the memory card of the present invention, by attaching a cushioning material to the surface opposite to the surface of the plate-shaped electrode that contacts the battery, the shock that the plate-shaped electrode receives when the battery is attached can be absorbed by the cushioning material. This makes it possible to prevent deformation and destruction of the plate electrode. Furthermore, the repulsive force of the buffer material allows the plate-shaped electrode to be pressed against the battery with a stronger force, and as a result, the stability of the contact between the plate-shaped electrode and the battery increases.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows the configuration of a memory card according to an embodiment of the present invention.
FIG. 2 is a plan view showing the configuration of a portion particularly related to a battery for backup power supply.

In the figure, 11 indicates a memory card cabinet (frame). Two exterior reinforcing plates 12 are bonded to the cabinet 11 and are opposed to each other with the cabinet 11 in between. Further, a circuit board 13 is supported in this cabinet 11, and on this circuit board 13, a plurality of memory elements 14 and control devices for performing various controls such as writing and reading data on these memory elements 14 are provided. An IC (not shown), a power supply electrode land 15, and the like are mounted. Further, a battery holder]7 that holds a battery 16 for backup power supply is removably housed in this memory card.

Further, 18 is a battery positive electrode electrically connected to the battery 16 held in the battery holder 17. This battery positive electrode 1
8 is constructed by providing an electrode plate 18a having a spring property in direct contact with the circumferential surface of the battery 6 at one end thereof, and the other end thereof is electrically connected to the above-mentioned power supply electrode land 15. A cushion material 19 made of, for example, urethane rubber is adhered to the surface of the battery positive electrode 8 opposite to the surface that comes into contact with the circumferential surface of the battery 6.

On the other hand, the power supply electrode land 15 and each memory element 14 are connected by conductor wiring (not shown), and the ground terminal of each memory element 14 is connected to the battery negative electrode (not shown) that contacts the bottom surface of the battery 16. ) and are connected through conductor wiring.

By the way, the battery positive electrode 18 including the above-mentioned electrode plate 18a is made of a spring material such as phosphor bronze. Therefore, when the battery holder 17 is inserted into the memory card, the battery 16
The electrode plate 18a is pushed back by the circumferential surface of the electrode plate 18a, and as a result,
The electrode plate 18a comes into elastic contact with the circumferential surface of the battery 16.

What should be noted here is that a cushion material 19 such as urethane rubber is provided on the opposite surface of the electrode plate 18a to the surface that comes into contact with the circumferential surface of the battery 16. This cushion material 19 has the role of reinforcing the electrode plate 18a itself and stabilizing the contact between the electrode plate 18a and the battery 16. That is, the cushion material 19 can partially absorb the impact that the electrode plate 18a receives when the battery holder 17 is inserted.
This makes it possible to prevent deformation and destruction of the electrode plate 18a. Furthermore, even if the battery holder 17 is accidentally inserted in the opposite direction, the effect of the cushion material 19 greatly reduces the risk of deformation or destruction of the electrode plate 18a. Furthermore, the repulsive force of one cushion material can press the N electrode plate 1.8 a against the circumferential surface of the battery 16 with a stronger force, and as a result, the stability of the contact between the electrode plate 1.8 a and the battery 16 is improved. increases.

Therefore, there is no need to increase the strength or rigidity of the electrode plate 18a itself in order to prevent deformation or destruction of the electrode plate 18a, so there is no need to increase the strength of the portion that supports the battery positive electrode 18. For example, the width of the cabinet at the part indicated by A in the figure conventionally required about 5mm, but in this embodiment, it only needs to be 2mm.

In addition, in the above-mentioned embodiment, a case was explained in which a cushioning material was attached only to the electrode plate of the battery positive electrode, but if a cushioning material was also provided to the electrode plate of the battery negative electrode, the same effect could be achieved for this battery negative electrode as well. effect can be obtained.

Further, the cushion material attached to the electrode plate may be a coil spring.

[Effects of the Invention] As explained above, according to the memory card of the present invention, by attaching a cushioning material to the surface of the plate-shaped electrode opposite to the surface that contacts the battery, the shock received by the plate-shaped electrode when the battery is attached can be reduced. This cushioning material can absorb the heat, thereby making it possible to prevent deformation and destruction of the plate-shaped electrode. Furthermore, the repulsive force of the buffer material allows the plate-shaped electrode to be pressed against the battery with a stronger force, and as a result, the stability of the contact between the plate-shaped electrode and the battery increases.

[Brief explanation of drawings]

FIG. 1 is a plan view for explaining the structure of a memory card according to an embodiment of the present invention, FIG. 2 is a plan view for explaining the structure of a conventional memory card, and FIG. 3 is a plan view for explaining the structure of a conventional memory card. FIG. 3 is a plan view for explanation. 11... Cabinet (frame), 12... Exterior reinforcing plate, 13... Circuit board, 14... Memory element,
15...Power electrode land, 16...Battery, 17...
- Battery holder, 18... Battery positive electrode, 18a... Electrode plate, 19... Cushion material.

Claims (1)

[Claims] A battery for backup power supply is removably built-in,
The memory card is also provided with a plate-shaped electrode that is electrically connected to the battery by elastically contacting the battery, characterized in that a cushioning material is provided on a surface of the plate-shaped electrode opposite to the surface that comes into contact with the battery. memory card.