CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority from Taiwanese utility model patent application no. 109200596, filed on Jan. 15, 2020.

FIELD

The disclosure relates to a battery holder, more particularly to a battery holding mechanism for being built in a wireless transmitter and receiver device.

BACKGROUND

Wireless transmitter and receiver devices are currently available in two designs for two different kinds of batteries. One kind of the batteries are disposable batteries such as AA batteries and the other kind of the batteries are rechargeable lithium batteries, such as ICR-18500 batteries. Because the two kinds of batteries have different sizes, one wireless transmitter and receiver device may be suitable for being installed with only one kind of the batteries. A user may want to select different kinds of the batteries for different purposes and occasions. Therefore, manufacturers must make the wireless transmitter and receiver devices in the two different designs, and apply for wireless regulatory certification for both the two designs. As such, the conventional wireless transmitter and receiver devices may have a relatively high cost in manufacturing and selling, and may be relatively inconvenience to the user.

SUMMARY

Therefore, an object of the disclosure is to provide a battery holding mechanism for being built in a wireless transmitter and receiver device, which overcomes at least one drawback of the prior art mentioned above.

According to the disclosure, a battery holding mechanism is for being built in a wireless transmitter and receiver device, and is adapted to selectively accommodate a first battery having a first outer diameter, or two second batteries each having a second outer diameter smaller than the first outer diameter. The battery holding mechanism includes a battery holder and a resilient positioning member. The battery holder defines therein an installation space which extends in an X direction and which is configured to selectively permit only the first battery to be axially installed in the installation space in the X direction, or permit only the second batteries to be axially installed in the installation space in the X direction in a juxtaposed manner. The resilient positioning member is connected to the battery holder, and is configured such that when the first battery is installed in the installation space, the resilient positioning member is disposed to resiliently abut against the first battery in a Z direction orthogonal to the X direction to thereby position the first battery within the battery holder, and such that when the second batteries are installed in the installation space, the resilient positioning member is disposed to resiliently abut against a first one of the second batteries in the Z direction to force the first one of the second batteries into abutment against the second one of the second batteries to thereby position the second batteries within the battery holder in the juxtaposed manner.

With the provision of the battery holding mechanism built in the wireless transmitter and receiver device, the wireless transmitter and receiver device may be installed with two disposable AA batteries or one rechargeable ICR-18500 lithium battery based on user requirement.

