JPS6134133B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a collapsible barrel camera.

With conventional retractable barrel cameras, if the barrel is accidentally retracted and an external force acts directly on the barrel when the barrel is protruding,
It has the disadvantage that the lens barrel is recessed.

The main purpose of the present invention is to eliminate such drawbacks, and the main purpose of the present invention is to use a control lever to project or retract the lens barrel, and a main spring to bias the lens barrel to the extended position and the retracted position. None, when retracting the lens barrel using the operating lever, the lock lever is pushed away by a push plate that moves backward using the lens barrel drive lever, and when an external force directly acts on the protruding lens barrel, the lock lever is Therefore, by preventing the push plate from moving backward, the lens barrel is prevented from retracting.

Hereinafter, the present invention will be described in detail with reference to the drawings showing preferred embodiments.

In the figure, reference numeral 1 denotes guide pins (not shown) protruding from both sides of the lens barrel, and the guide pins 1 are supported by passing through horizontal guide grooves 3 formed in guide plates 2 disposed on both sides of the lens barrel. ing. The end of the guide pin 1 protruding from the horizontal guide groove 3 engages with the vertical guide groove 5 of the push plate 4. A cam surface 6 is formed at the top of the push plate 4, and a pivot hole 7 is formed at the center.
has been formed. The push plate 4 is rotatably pivoted through a pivot hole 7 to a horizontal push pin 9 installed at the upper end of the lens barrel drive lever 8. In order to restrict the angle at which the push plate 4 can rotate around the push pin 9, locking portions 10 and 11 are formed on the lens barrel drive lever 8. Reference numeral 12 denotes an interlocking elongated hole formed in the center of the lens barrel drive lever 8. The left and right lens barrel drive levers 8 have respective base ends fixed to both ends of the connecting shaft 13 . The connecting shaft 13 is rotatably supported by shaft bearings provided at the lower portions of left and right side plates of a box (not shown) disposed outside the guide plate 2. 14 is a guide plate 2 so that its tip portion faces the cam surface 6 of the push plate 4.
This is a lock lever that is rotatably attached to a pivot shaft 30 provided in the holder via a torsion spring (not shown). 1
Reference numeral 5 denotes a vertical swing lever placed on the outside of the right side panel of the box, the upper end of which is connected to the swing lever shaft 1 fixed horizontally to the upper part of the right side panel of the box.
6, and is adapted to swing in a vertical plane parallel to the right side plate (not shown) of the box. A swing pin 17 is installed on the lower inner surface of the vertical swing lever 15, and a passive swing pin 18 is installed downward at the lower end. The swing pin 17 enters the box through an opening in the right side plate (not shown) of the box, and is inserted into the lens barrel drive lever 8.
It is engaged with the interlocking elongated hole 12 of. Reference numeral 19 denotes a horizontal rotation lever rotatably pivoted on a pivot shaft 20 installed in a lower base plate attached to the bottom of the camera body (not shown), and a guide formed near the tip. A passive swing pin 18 of the swing lever 15 is engaged with the groove 21. A bending guide groove 22 is formed at the tip of the horizontal rotation lever 19. The bending guide groove 22 is a lens barrel projecting/retracting groove 2 that extends in a direction substantially diagonally across the horizontal rotation lever 19.
2a, and an idle groove 22b for opening and closing the lens cover, which communicates with the groove 22a through a bent portion and extends substantially in the longitudinal direction of the horizontal rotation lever 19. Reference numeral 23 denotes an operating lever shaft rotatably mounted on the lower base plate, and the base of each operating lever 24 and an operating lever 25 above it are fixed to the operating lever shaft 23 so as to form a bell crank shape. . The actuating pin 26 installed at the tip of the actuating lever 25 is connected to the bending guide groove 22 of the horizontal rotation lever 19.
is engaged in. Reference numeral 27 denotes a knob formed at the tip of the operating lever 24, which protrudes forward from the bottom of the camera. Reference numeral 28 denotes a main spring, the hook at one end of which is engaged with the actuating pin 26 protruding through the bending guide groove 22, and the hook at the other end is engaged with the lower base plate on the opposite side of the actuating pin 26 with respect to the operating lever shaft 23. It is locked to a spring hook pin 29 planted in the. Note that in the figure, the white arrow indicates the forward direction of the camera.

Since the retractable lens barrel camera of the present invention is constructed as described above, in the drawing showing the protruding state of the lens barrel, the user hooks the fingertip onto the knob 27 of the operating lever 24 and moves the operating lever 24 onto the operating lever shaft 23. When the lens barrel is rotated clockwise together with the shaft, the lens barrel is retracted into the camera body by the action described in detail below, and when the lens barrel is retracted, the operating lever 24 is rotated around the operating lever shaft 23. When rotated counterclockwise along with the shaft, the lens barrel protrudes from within the camera body. That is, as described above, when the operating lever 24 is rotated clockwise around the operating lever shaft 23, the operating lever 25 is rotated clockwise via the operating lever shaft 23. When the lens barrel is in the protruding state, the actuating pin 26 of the actuating lever 25 is moved to the horizontal rotation lever 1.
9, the actuating pin 26 is engaged with the lens barrel protruding/retracting groove 22a near the bending communication part, so by clockwise rotation of the operating lever 25, the actuating pin 26 moves the lens barrel protruding/retracting groove 22a toward the distal end portion. Reciprocating movement, horizontal rotation lever 1
9 rotates counterclockwise around a pivot shaft 20.
In the process in which the operating lever 25 rotates clockwise as described above, the main spring 28 is aligned in a straight line with the operating pin 26 sandwiching the operating lever shaft 23 and the spring hook pin 29 that engages the hooks at both ends of the main spring. It continues to expand until it reaches the so-called dead center, which is lined up with , and contracts after passing the dead center, so
When the operating lever 24 is rotated clockwise, that is, when the lens barrel is retracted, the main spring 28
When the horizontal rotation lever 19 is urged toward the rear of the camera and the operation lever 24 is rotated counterclockwise, that is, when the lens barrel is in the projecting state, the main spring 28
urges the horizontal rotation lever 19 toward the front of the camera.
This forces the lens barrel into the retracted or protruded state. By rotating the horizontal rotating lever 19 in the counterclockwise direction, the horizontal rotating lever 19
The passive swing pin 1 engaged with the guide groove 21 of
8, the vertical swing lever 15 rotates clockwise around the swing lever axis 16. Since the interlocking elongated hole 12 of the lens barrel drive lever 8 is engaged with the swing pin 17 of the vertical swing lever 15, when the vertical swing lever 15 rotates clockwise as described above, the lens barrel drive lever 8 is the connecting shaft 1
3 in a counterclockwise direction along with the axis.
By the rotation of the connecting shaft 13, the left and right lens barrel drive levers 8, 8, push plates 4, 4, guide pin 1,
The first class is designed to operate synchronously. For convenience of explanation, I will explain the right side first.
Since the tip of the guide pin 1 is engaged with the vertical guide groove 5 of the push plate 4 which is rotatably attached to the push pin 9 of the lens barrel drive lever 8, the lens barrel drive lever 8 is rotated as described above. At the initial stage of rotation in the counterclockwise direction, the cam surface 6 of the push plate 4 contacts the tip of the lock lever 14 so as to be substantially orthogonal to it, so the push plate 4 rotates clockwise around the push pin 9. Then, the lower end portion of the push plate 4 separates from the locking part 10 of the lens barrel drive lever 8 near the front of the camera and comes into contact with the locking part 11 near the rear of the camera, and the push plate 4 rotates further clockwise. Regulate what you do. By this, the cam surface 6
moves, and the angle between the cam surface 6 and the lock lever 14 gradually becomes smaller. Next, the push plate 4 rotates counterclockwise around the connecting shaft 13 together with the lens barrel drive lever 8, so that the lock lever 14 is pushed away by the cam surface 6 of the push plate 4.
It rotates clockwise around the pivot shaft 30 against the torsion spring of the lock lever. In the later stage when the lens barrel drive lever 8 rotates counterclockwise, the push plate 4 rotates integrally with the lens barrel drive lever 8 from the front to the rear of the camera, so that the vertical guide groove of the push plate 4 The guide pin 1 engaged with the guide plate 5 moves toward the rear of the camera along the horizontal guide groove 3 of the guide plate 2. The left guide pin also moves toward the rear of the camera in synchronization with the right guide pin. Since the guide pins 1, 1 protruding from the left and right sides of the lens barrel move synchronously to the rear of the camera as described above, the lens barrel is smoothly and accurately recessed into the camera body. When the barrel retraction is completed, the operating pin 26 in the barrel protrusion/retraction groove 22a is inserted into the lens barrel extension/retraction groove 22a.
2a and the lens cover opening/closing idle groove 22b have reached the position just before entering the communicating bending part.

The lock lever 14, which was pushed away by the push plate 4 in the process of retracting the lens barrel, is returned to its original state by the torsion spring at the same time as it disengages from the push plate 4. Since the tip of the lock lever 14 facing the cam surface 6 of the push plate is inclined toward the front and bottom of the camera, the lock lever 14 moves from the rear of the camera toward the front in the process of projecting the lens barrel. It is smoothly pushed away by the top of the push plate 4. When the lens barrel is in the protruding state, the lower end of the push plate 4 is in contact with the locking portion 10 of the lens barrel drive lever 8 located near the front of the camera, so the force pushing the guide pin 1 toward the rear of the camera causes the push plate 4 to can not be rotated around the push pin 9. Also, a lock lever 14 is attached to the cam surface 6 of the push plate 4.
are in vertical contact.

Therefore, when the lens barrel is in the protruding state, the operating lever 2
If an external force is accidentally applied directly to the lens barrel without using the knob 27 of 4, the external force becomes a force that pushes the push plate 4 toward the rear of the camera via the guide pin 1. Furthermore, this force becomes a component force transmitted to the lock lever 14 via the cam surface 6 and a component force transmitted to the push pin 9 via the pivot hole 7.
The component force transmitted to the push pin 9 is large, and the component force transmitted to the push pin 9 is extremely small. The large force transmitted to the lock lever 14 is caused by the pivot shaft 3 embedded in the guide plate.
0, most of the external retraction force that directly acts on the lens barrel is received by the pivot shaft 30. The extremely small component of force transmitted to the push pin 9 is transmitted to the lens barrel drive lever 8 and the interlocking elongated hole 1.
2. Swing pin 17, vertical swing lever 1
5. Passive swing pin 18, guide groove 21, horizontal rotation lever 19, bending guide groove 22, lens barrel projection groove 2
2a to the actuating pin 26 of the actuating lever 25, and acts to rotate the actuating pin 26 clockwise around the operating lever shaft 23, but this force is due to the lens barrel being in the protruding state. Therefore, the remainder of the retraction external force that directly acts on the lens barrel is transferred to the main spring via the lens barrel elongation groove 22a. It is received by the actuating pin 26 under the bias of 28. As is clear from the above, even if a retraction external force is applied directly to the lens barrel in the protruding state, most of the external force is received by the pivot shaft of the lock lever and the rest is received by the operating pin. This allows the lens barrel to remain in its protruding state.

According to the present invention, the lens barrel can be smoothly and accurately extended or retracted using the operation lever, and the lens barrel can be biased into the extended state and the retracted state. Even if an external force acts directly on the lens barrel by mistake, the projecting state of the lens barrel can be maintained.

[Brief explanation of the drawing]

The drawing is an exploded perspective view showing an outline of the internal structure of an embodiment of the present invention. 1: Guide pin, 2: Guide plate, 3: Horizontal guide groove, 4: Push plate, 5: Vertical guide groove, 6: Cam surface, 7: Pivot hole, 8: Lens barrel drive lever, 9: Push pin, 10 , 11: Locking part, 12: Interlocking slot, 13: Connection shaft, 14: Lock lever, 15:
Vertical swing lever, 16: swing lever shaft,
17: Swing pin, 18: Passive swing pin,
19: Horizontal rotation lever, 20: Pivoting shaft, 21: Guide groove, 22: Bend guide groove, 22a: Lens barrel projection groove, 22b: Idle groove for opening and closing the lens cover, 2
3: Operation lever shaft, 24: Operation lever, 25: Operation lever, 26: Operation pin, 27: Knob, 2
8: Main spring, 29: Spring hanging pin, 3
0: Pivot axis.

Claims (1)

[Claims] 1. Guide pins protruding from both sides of the lens barrel are supported in guide grooves provided in parallel to guide plates arranged on both sides of the lens barrel, and left and right pushers move the guide pins back and forth along the guide grooves. A plate is pivotally attached to the left and right lens barrel drive levers so that it can rotate within a predetermined angular range, and one lens barrel drive lever is used to bias the vertical swing lever, horizontal rotation lever, and lens barrel in the protruding or retracting direction. A main spring is interlocked with an operating lever via an operating lever connected thereto, so that the operating lever is used to protrude or retract the lens barrel, and when the operating lever is used to retract the lens barrel, the main spring is connected to the operating lever. A lens barrel that is pushed away by a pusher plate and has a lock lever provided at the top of the pusher plate to prevent the pusher plate from moving backward when an external force is directly applied to the lens barrel in a protruding state. Retractable camera.