JP2003302563A - Contact structure for lens barrel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize cost reduction by facilitating the assembly of a contact used for a lens barrel. <P>SOLUTION: The contact structure for a lens barrel is equipped with a flexible printed circuit board (4), a plurality of contact springs (3) electrically connected (pressure-contact) to the board (4), a main body part (1) for holding the spring (3), and a holding member (1b) which is formed on the main body part (1) and in which the spring (3) is inserted. The direction in which the spring (3) is inserted is parallel with a photographic optical axis, and the direction of the spring pressure of the spring (3) is the radial direction of the lens barrel. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact structure in a lens barrel.

[0002]

2. Description of the Related Art A plurality of contacts used for a lens barrel are provided for communicating with a camera body and exchanging data. Depending on the type of lens, about 10 lenses are required. Due to the nature of the contacts, these need to be placed separately and insulated from each other. Since this contact is arranged inside the mount portion of the lens barrel, it must be arranged in an arc shape. Moreover, it must be assembled between the arc-shaped upper lid and the lower lid.
When assembling 10 lens barrels that require about 0 contacts at the same time, the spring pressure increases by the number of contact springs.
Assembling becomes difficult and the time required for assembling becomes a factor of cost increase.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to facilitate the assembly of contacts used in a lens barrel and to reduce the cost.

[0004]

In order to achieve this object, the invention of claim 1 is electrically connected (pressurized contact) to the flexible printed board (4) and the flexible printed board (4). A plurality of contact springs (3), a main body (1) holding the contact springs (3), and a holding member (1) formed in the main body (1) and into which the contact springs (3) are inserted.
b) and the direction in which the contact spring (3) is inserted is parallel to the photographing optical axis, and the spring pressure direction of the contact spring (3) is the radial direction of the lens barrel. .

According to a second aspect of the present invention, the cover member (2) according to the first aspect further comprises a lid member (2) for preventing the contact spring (3) from falling off after the contact spring (3) is inserted. ) Is attached to the main body part (1) from the same direction as the contact spring (3) is inserted.

According to a third aspect of the invention, in the first aspect, the shape of the holding member (1b) into which the contact spring (3) is inserted is
It is characterized by being groove-shaped or bag-shaped.

According to a fourth aspect of the present invention, in the second aspect, the main body portion (1) and the lid member (2) are separated from each other by a substantially central portion of the contact pin (3a) of the contact spring as a photographing optical axis direction. It is characterized in that it is formed so as to be separable.

According to a fifth aspect of the present invention, in the first aspect, a lid member (12) for preventing the contact spring (13) from coming off is further provided, and the main body (1) into which the contact spring (13) is inserted.
1) through the lens mount (1) via the lid member (12).
It is characterized in that it is attached to 5) and configured integrally.

According to a sixth aspect of the present invention, in the fifth aspect, the lid member (12) is provided as a part of the rear protection ring.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing a first embodiment of a contact structure in a lens barrel according to the present invention, showing a state in which a main body 1 and a lid 2 are assembled.

The main body 1 and the lid 2 are provided with a protrusion 3a of the contact pin 3.
Can be divided by the line segment L, with the approximate center of the hole G protruding as a boundary.

2 and 3 are a front view and a side view for explaining the main body 1. The main body 1 has an arc shape as shown in FIG. 3, and the diameter of the arc is matched with the diameter of a lens barrel (not shown) to which the main body 1 is attached. A semicircular hole 1a is provided on the right side surface (FIG. 2) of the main body 1. Below the main body 1, a hole 1b into which a U-shaped bent spring 3b is inserted is provided parallel to the optical axis (perpendicular to the plane of FIG. 3). In this embodiment, five sets of contact pins 3 are provided, but five or more sets may be provided.

FIG. 3 is a side view of the main body 1 viewed from the right side of FIG. 2, in which two holes 1e are provided in the circumferential direction. Boss 2b provided on the lid 2 when combined with the lid 2
Fit into the holes 1e to prevent the main body 1 and the lid 2 from being displaced. At almost the same position as the hole 1e, two protrusions 1c are provided in the inner peripheral surface direction (right direction in FIG. 3), and when combined with the lid 2, the hole 2c provided in the lid 2 snaps to the protrusion 1c. Engage in a fit manner to prevent separation of body 1 and lid 2.

Flexible printed circuit boards 4 to be described later are inserted into elongated holes 1f and 1g that are long in the circumferential direction and are provided at two locations in the circumferential direction. A projection 1h is provided at one location in the outer peripheral direction on a part of the elongated hole 1f. Protrusion 1h
Is the hole 4 provided in the flexible printed circuit board 4.
The position of the flexible printed circuit board 4 is fixed by engaging with a. Two mounting holes 1d for fixing to a bayonet of a lens barrel (not shown) with screws are provided at two locations on the outer peripheral surface of the main body 1.

FIG. 4 is a front view showing the lid 2, and FIG. 5 is a side view of the lid 2 seen from the left side of FIG. The lid 2 is provided with five semicircular holes 2a in the opposite direction to the semicircular holes 1a of the main body 1. Bosses 2b are provided at two positions in the circumferential direction, and when combined with the main body 1, the bosses 2b are fitted into the holes 1e provided in the main body 1 to prevent the main body 1 and the lid 2 from being displaced. . At the same position as the boss 2b,
Two holes 2c are provided in a portion extending in the optical axis direction (direction perpendicular to the paper surface of FIG. 5). When combined with the main body 1, the projection 1c provided on the main body 1 engages with the hole 2c in a snap-fit manner to prevent separation of the main body 1 and the lid 2. The semicircular hole 1a provided in the main body 1 and the semicircular hole 2a provided in the lid 2 are substantially circular as shown in FIG. 1 when the main body 1 and the lid 2 are combined. Hole is formed and functions as a guide hole for the protrusion 3a of the contact pin 3.

FIG. 6 is a sectional view taken along the line AA of FIG. 1, showing the main body 1, the lid 2, the contact pins 3, and the flexible printed circuit board 4.
Shows the combined state. Below the groove 1b provided in parallel with the optical axis of the main body 1 (on the right side in FIG. 3), the flexible printed circuit board 4 and the contact pin 3 are arranged via the elongated holes 1f and 1g, and the lid 2 is further attached. Are combined.

FIG. 7 is a sectional view taken along the line BB in FIG. 1. The relationship between the boss 2b of the lid 2 and the hole 1e provided in the main body 1, that is, the hole 2c of the lid 2 and the main body 1 is provided. The state in which the protrusion 1c is engaged is shown.

FIG. 8 is a rear view showing the state of FIG. 7 viewed from the direction C, and shows the state in which the hole 2c and the protrusion 1c are engaged with each other.

FIG. 9 is a front view showing the flexible printed circuit board 4 alone. There is one hole 4a for retaining that engages with the protrusion 1h of the main body 1. Exposed part 4b
Then, the conductor is exposed and comes into contact with the conductive portion 3c (FIG. 6) of the contact pin 3.

Next, the assembly process will be described. First, the flexible printed circuit board 4 is inserted into the main body 1 from the left side of the main body 1 (FIGS. 1 and 2). At this time, long holes 1f and 1g
Since the radial dimension of is larger than the sum of the height of the protrusion 1h and the thickness of the flexible printed circuit board 4, the flexible printed circuit board 4 passes over the protrusion 1h.
After that, the protrusion 1h of the main body 1 and the hole 4a of the flexible printed board 4 are fitted to fix the flexible printed board 4. Next, the contact pins 3 are respectively inserted into the grooves 1b of the main body 1 from the right direction (FIGS. 1 and 2). When the contact pin 3 is inserted, the flexible printed board 4 is pushed downward (FIG. 6) by the spring pressure of the U-shaped portion of the contact pin 3, and the projection 1h of the main body 1 and the hole 4a of the flexible printed board 4 are pushed. Engagement will not come off easily.

After that, the lid 2 is assembled to the assembly of the main body 1, the flexible printed circuit board 4, and the contact pins 3 to complete the contact portion assembly. The spring pressure of the contact pin 3 is as shown in FIG.
It works in the vertical direction. The direction in which the lid 2 is assembled is the left-right direction in FIG. That is, when the lid 2 is assembled, it is assembled in the direction in which the spring pressure of the contact pin 3 is not effective, so that the lid 2 can be easily assembled without being affected by the spring pressure of the contact pin 3.

10 to 17 are front views showing a second embodiment of the contact structure in the lens barrel according to the present invention, showing a state where the main body 11 and the lid 12 are assembled.

The body 11 and the lid 12 have a line segment L as a boundary with the center of the hole H through which the protrusion 13a of the contact pin 13 projects.
It is divided by 1. 11 and 12 are a front view and a side view illustrating the main body 11. The main body 11 is provided with a semicircular hole 11a on the right outer peripheral portion (FIG. 11). Below the hole 11a (on the left side in FIG. 11), a hole 11b into which the spring portion 13b of the contact pin 13 folded into a U shape is inserted is provided in parallel with the optical axis. In this embodiment, the number of contact pins 13 is five.

FIG. 12 is a side view of the main body 11 seen from the right side of FIG. 11, showing the flexible printed circuit board 14 in the circumferential direction.
Is provided with an elongated hole 11f into which the
A part of 1f has a protrusion 11c provided at one position in the outer peripheral direction, and has a function of engaging with a hole 14a provided in the flexible printed circuit board 14 to fix the position of the flexible printed circuit board 14. .

FIG. 13 is a front view showing the lid 12, and FIG. 14 is a side view of the lid 12 seen from the left side of FIG. The lid 12 is a member for protecting the rear portion of the lens barrel (not shown), and is provided on the inner peripheral portion of the bayonet mount 15 in a cylindrical shape over the entire circumference. A recess 12b shown in FIG. 13 is provided in a part of the lid 12, and the main body 11 fits in the recess 12b. The state in which the main body 11 is fitted is shown in FIG.

The recess 12b of the lid 12 is provided with five semicircular holes 12a in the direction opposite to the semicircular holes 11a of the main body 11. The semi-circular hole 11a provided in the main body 11 and the semi-circular hole 12a provided in the lid 12 are, when the main body 11 and the lid 12 are combined,
As shown in FIG. 1, a substantially circular hole is formed, and the contact pin 13
Functions as a guide hole for the protrusion 13a.

FIG. 15 is a sectional view taken along line CC of FIG.
The state where the main body 11, the lid 12, the contact pins 13, and the flexible printed board 14 are combined is shown. The hole 11 is provided below the groove 11b provided in parallel with the optical axis of the main body 11.
The flexible printed circuit board 4 is inserted from f, and the contact pin 1 is attached to the upper side (FIG. 15) of the flexible printed circuit board 14.
3 is inserted, and the lid 12 is further combined.

FIG. 16 is a sectional view taken along the line D--D in FIG. 10, in which a small screw 16 is screwed into a tap hole 12b of the lid 12 in a bayonet mount 15 of a lens barrel (not shown), so that the lid 12 is removed. It is fixed.

FIG. 17 is a front view showing the flexible printed circuit board 14, which has one hole 14a for retaining with which the projection 11c of the main body 11 is engaged. Hole 14b
Is a portion where the conductor is exposed, and is provided in a portion of the contact pin 13 that comes into contact with the conductive portion 13c of the flexible printed board 14.

Next, the assembly procedure of the second embodiment will be described. First, the flexible printed circuit board 14 is inserted into the main body 11 from the left side (FIG. 15) of the main body 11. At this time, slot 1
Since the radial dimension of 1f is larger than the sum of the height of the protrusion 11c and the thickness of the flexible printed circuit board 14, the flexible printed circuit board 14 is placed above the protrusion 11c.
Passes through. The flexible printed circuit board 14 is fixed by fitting the protrusion 11c of the main body 11 and the hole 14a of the flexible printed circuit board 14 into each other.

Next, this flexible printed circuit board 14
The contact pins 13 are inserted into the grooves 11b in the optical axis direction of the main body 11 from the direction opposite to the inserting direction of the contact pins. Contact pin 1
3 is inserted, the flexible printed circuit board 14 is pushed downward (FIG. 15) by the spring pressure of the U-shaped portion of the contact pin 13, so that the protrusion 11c of the main body 11 and the hole 14a of the flexible printed circuit board 14 are engaged. If it does, it will not come off easily. After this, the main body 11 and the flexible printed circuit board 1
4 and the contact pin 13 assembly into the recess 12b of the lid 12
The lid 12 is fixed to the bayonet mount 15 with a small screw 16 while being fitted into the contact point assembly. This lid 12
Since the contact pin 13 is assembled in a direction in which the spring pressure of the contact pin 13 is not effective, it can be easily assembled.

Optical axis left direction of the main body 11 (left direction in FIG. 15)
Is a wall 15a perpendicular to the optical axis of the bayonet mount 15.
And the wall portion 11g perpendicular to the optical axis of the main body 11 is abutted to limit. Further, the right direction of the optical axis of the main body 11 (right direction of FIG. 15) is limited by the contact between the wall portion 11h perpendicular to the optical axis of the main body 11 and the wall portion 12c perpendicular to the optical axis of the lid 12. . That is, if the lid 12 is fixed to the bayonet mount 15 with the machine screw 16, the main body 11 is also fixed at the same time, and it is not necessary to fix the main body 11 in particular.

[0034]

As described above, according to the contact structure in the lens barrel of the present invention, the direction in which the contact spring (3) is inserted is parallel to the photographing optical axis and the spring pressure of the contact spring (3). Since the holding member holding member (1b) receives the spring pressure of the contact spring (3) with the direction of the arrow being the radial direction of the lens barrel, it is possible to assemble a plurality of contacts integrally. It will be very easy and it will be possible to significantly reduce costs.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment of a contact structure in a lens barrel according to the present invention.

FIG. 2 is a front view showing the first embodiment of the contact structure in the lens barrel according to the present invention.

FIG. 3 is a side view showing a first embodiment of a contact structure in a lens barrel according to the present invention.

FIG. 4 is a front view showing the first embodiment of the contact structure in the lens barrel according to the present invention.

FIG. 5 is a side view showing a first embodiment of a contact structure in the lens barrel according to the present invention.

FIG. 6 is a sectional view showing a first embodiment of a contact structure in a lens barrel according to the present invention.

FIG. 7 is a sectional view showing a first embodiment of a contact structure in a lens barrel according to the present invention.

FIG. 8 is a rear view showing the first embodiment of the contact structure in the lens barrel according to the present invention.

FIG. 9 is a front view showing the first embodiment of the contact structure in the lens barrel according to the present invention.

FIG. 10 is a front view showing a second embodiment of the contact structure in the lens barrel according to the present invention.

FIG. 11 is a front view showing a second embodiment of the contact structure in the lens barrel according to the present invention.

FIG. 12 is a side view showing a second embodiment of the contact structure in the lens barrel according to the present invention.

FIG. 13 is a front view showing a second embodiment of the contact structure in the lens barrel according to the present invention.

FIG. 14 is a side view showing a second embodiment of the contact structure in the lens barrel according to the present invention.

FIG. 15 is a sectional view showing a second embodiment of the contact structure in the lens barrel according to the present invention.

FIG. 16 is a sectional view showing a second embodiment of the contact structure in the lens barrel according to the present invention.

FIG. 17 is a front view showing a second embodiment of the contact structure in the lens barrel according to the present invention.

[Explanation of symbols]

1 body 1a hole 1b hole (groove) 1c protrusion 1d mounting hole 1e hole 1f slot 1g long hole (wall) 1h protrusion 2 lid 2a hole 2b boss 2c hole 3 contact pins 3a protrusion 3b Spring part 3c Conducting part 4 Flexible printed circuit board 4a hole 4b Exposed part 11 body 11a hole 11b hole (groove) 11c protrusion 11f long hole 11h wall 12 lid 12a hole 12b tap hole 12b recess 12c wall 13 contact pins 13a protrusion 13b Spring part 13c Conducting part 14 Flexible printed circuit board 14a hole 14b hole 15 bayonet mount 15a wall 16 machine screws

Claims (6)

[Claims] 1. A flexible printed circuit board, a plurality of contact springs electrically connected to the flexible printed circuit board, a main body holding the contact springs, a main body formed on the main body, and the contact springs inserted therein. A lens barrel, wherein a direction in which the contact spring is inserted is parallel to a photographing optical axis, and a spring pressure direction of the contact spring is a radial direction of the lens barrel. Contact structure in. 2. A lid member for preventing the contact spring from coming off after the contact spring is inserted, the lid member being in the same direction as the insertion direction of the contact spring. The contact structure in the lens barrel according to claim 1, wherein the contact structure is attached to the. 3. The contact structure in a lens barrel according to claim 1, wherein the shape of the holding member into which the contact spring is inserted is a groove shape or a bag shape. 4. The main body portion and the lid member are formed so as to be separable in the direction of the optical axis of photography, with a substantially central portion of a contact pin of the contact spring as a boundary. A contact structure in the lens barrel described. 5. A lid member that is integrally provided with a lens mount portion and prevents the contact spring from coming off, and the main body portion in which the contact spring is inserted is attached to the lid member. The contact structure in the lens barrel according to claim 1. 6. The contact structure in a lens barrel according to claim 5, wherein the lid member is provided as a part of the rear protection ring.