Hearing aid
A hearing aid includes a main body and a battery holder that can be opened and closed with respect to the main body by revolving around a revolving shaft. The main body has a lock bar provided so as to traverse the space in which the battery holder is installed, and a protruding portion that protrudes toward this installation space. The battery holder has a first concave portion and a second concave portion that latch the lock bar and the protruding portion.
1. A hearing aid, comprising:
a main body having a storage space;
a revolving shaft disposed in the main body;
a battery holder configured to be opened and closed with respect to the main body by revolving around the revolving shaft, and being configured to be installed in the storage space;
a lock bar disposed in the main body and being configured and arranged to pass through the storage space;
a protruding portion that disposed in the main body and protruding into the storage space; and
a latching portion disposed on the battery holder and having a slit forming a cut-out space, the slit having a first concave portion disposed on an open end side and a second concave portion disposed farther inside the slit relative to the first concave portion, the latching portion moving relative to the protruding portion and the lock bar on the main body when the battery holder is opened or closed with respect to the main body, the first concave portion being configured to latch to the protruding portion and the lock bar, and the second concave portion being configured to latch to the lock bar when the protruding portion is latched in the first concave portion.
2. The hearing aid according to claim 1 , wherein
the battery holder is configured so as to be capable of being opened by a specific angle with respect to the main body in a first latched state in which the lock bar is latched in the first concave portion, and is configured so as to be completely closed with respect to the main body in a second latched state in which the protruding portion is latched in the first concave portion and the lock bar is latched in the second concave portion.
3. The hearing aid according to claim 2 , wherein
in the second latched state, power is on, and in the first latched state, the power is off.
4. The hearing aid according to claim 1 , wherein,
a diameter of the protruding portion is R 1 , and a diameter of the lock bar is R 2 , and the following relation is satisfied:
R 1 >R 2.
5. The hearing aid according to claim 1 , wherein,
a size of the gap of the slit in the first concave portion is r 1 , a size of the gap of the slit in the second concave portion is r 2 , a diameter of the protruding portion is R 1 , and a diameter of the lock bar is R 2 , and the following relation is satisfied:
r 1 −R 1 >r 2 −R 2,
6. The hearing aid according to claim 1 , wherein,
a size of the gap of the slit in the first concave portion is r 1 , a size of the gap of the slit in the second concave portion is r 2 , a size of the gap of the slit at the portion other than the first and second concave portions is r 3 , a diameter of the protruding portion is R 1 , and a diameter of the lock bar is R 2 , and the following relation is satisfied:
r 1 ≈r 2 >R 1 >R 2 >r 3,
7. The hearing aid according to claim 1 , wherein,
the latching portion is configured and arranged such that first the lock bar and then the protruding portion are latched in the first and second concave portions, respectively, when the battery holder is closed.
8. The hearing aid according to claim 1 , wherein
the lock bar metal.
9. The hearing aid according to claim 1 , wherein
the main body is a combination of a first housing and a second housing, and
the lock bar links the first housing and the second housing.