JPH076788U - clock - Google Patents

Abstract

(57) [Abstract] [Purpose] To easily detect a mounting deviation of the front cover in a timepiece having a time display means on the front cover and to correct the deviation. [Structure] A watch mechanical body 2 is mounted on a rear frame 1, and an outer peripheral portion 7a of a front cover 7 made of glass is attached by a front surface of an edge portion 1f of the rear frame 1 and an inner peripheral portion of a rear surface of a front frame 8. Both frames being held are fixed together by screws 9. On the front cover, the hour display characters 7b and the rectangular position detection marks 7c, which are arithmetic numerals, are printed in black. The mark 7c for position detection is provided on the outer peripheral portion 7a of the front cover 7, and a through hole 1h that can face the mark 7c is provided below the edge 1f.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a timepiece.

[0002]

[Prior art]

 Generally, the frame of a wall clock or a table clock fits the outer peripheral part of the front cover into the edge protruding to the front side of the rear frame, presses the inner peripheral part of the front frame against the front surface, and presses it between the two frames. It consists of a front cover sandwiched between the two frames, and the two frames are screwed together to fix the three members together.

Recently, according to the diversification of designs of watches, hour display characters, time scales, etc. are provided on the front cover. In this case, it is required that the front cover is installed so that the letters, etc. are in the correct position with respect to the frame. However, if the front cover has a circular shape, it may easily rotate while it is attached to the frame, and the position of the hour display characters may be misaligned. How to install the front cover accurately? Is a problem.

The following means are adopted as an example of the preventive measures against the rotation of the front cover. First, the front cover has a non-circular shape so that it does not rotate. Second, at the time of assembling and at the time of completion, the inspection is performed using the inspection jig for these deviations, and if there is any deviation between the frame and the front cover, this is corrected. Thirdly, a small hole is provided in the outer peripheral portion of the front cover, and the front cover is screwed to the edge portion of the rear frame that is in contact with the outer peripheral portion of the front cover through the small hole.

[0005]

[Problems to be solved by the device]

 However, if the shape of the front cover is limited to something other than a circular shape as in the first example, the main purpose is to visually recognize the position of the pointer around which the front cover rotates, which is a design problem. There is a problem that the constraint of becomes large. In addition, when inspecting with a displacement inspection jig as in the second example, this jig is naturally required, and it is troublesome to set or remove the clock on this jig. That ratio has the drawback that it cannot be aligned with high precision. In the third example, there is a problem that it takes time and labor such as drilling and screwing. In this way, when the front cover provided with the time display means is adopted, it is desired that the front cover can be easily attached to the correct position.

Therefore, an object of the present invention is to make it possible to easily attach a circular front cover provided with a time display means to a correct position.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the timepiece of the present invention is provided with a rear frame on which a timepiece mechanical body is mounted, a front frame provided on the front surface of the rear frame, a time display means, and an outer peripheral portion at the rear. In a timepiece having a front cover held by a frame and a front frame, a mark for position detection is provided on the outer peripheral portion of the front cover, and the mark can be visually recognized on the surface facing the outer peripheral portion of the rear frame. Through holes are provided.

[0008]

[Action]

 Since the position of the position detection mark provided on the front cover can be visually confirmed from the through hole during and after assembly, if there is a deviation in the mounting state of the front cover, this can be immediately detected and the time immediately detected. The gap can be easily corrected with.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, the timepiece mechanical body 2 is mounted in the recess 1a provided in the rear surface of the central portion of the rear frame 1, and the pointer shaft 2a provided in the central portion of the timepiece mechanism is It projects through the hole 1 b provided in the center of the frame 1 to the front surface of the rear frame 1.

Inside the concave portion 1c formed on the front surface side of the rear frame 1, step portions 1d and 1e for dividing a space for storing the timepiece mechanical body 2 and a space for storing the pointer are formed. A dial plate 3 is attached in contact with the front surface of the step portion.

A pointer composed of a clock 4 and a minute hand 5 is attached to the pointer shaft 2a, and these finger hands are rotatable and movable along the front surface of the dial 3 in the recess 1c.

An edge 1f formed so as to surround the recess 1c of the rear frame 1 projects in a ring shape toward the front side of the rear frame 1 with a predetermined width, and the outer peripheral surface of the edge 1f is the same as the back side of the rear frame. It retreats to a position where it becomes a flat surface, and then expands outward again to form a screw mounting portion 1g projecting forward at a key portion thereof. On the outer side of the screw mounting portion 1g, an outer side surface that comes into contact with a front frame 8 described later is formed. Packings 6 for protecting the front cover from external impacts are provided in the recesses provided at the positions corresponding to the times of 3 o'clock, 9 o'clock, and 12 o'clock on the front surface of the edge portion 1f.

An outer peripheral portion 7a of a front cover 7 made of glass is provided in contact with the front surface of the edge portion 1f. The front cover 7 is fitted inside the protrusion formed on the outer peripheral portion of the edge portion 1f of the rear frame, and its planar movement is restricted. On the back surface of the front cover 7, a time display character 7b as an example of time display means is printed in black in a font in which the front surface and the back surface are reversed so that when viewed from the front, the numerals 1 to 12 can be seen. . Further, a rectangular black mark 7c for position detection is provided on the back surface of the lower position of the character 6 (see FIG. 3).

A front frame 8 is fixed to the front surface of the rear frame 1 integrally with the rear frame 1 by a screw 9 inserted from a screw mounting portion 1g of the rear frame 1. Since the outer peripheral portion of the front frame 8 is formed so as to match the outer peripheral portion of the rear frame 1, the outer peripheral side surfaces are flush with each other during assembly. The front cover 7 has the front surface of its outer peripheral portion 7 a pressed down by the inner peripheral portion of the front frame 8 and is sandwiched between the rear frame 1 and the front frame 8. A through hole 1h is provided at a lower position of the edge portion 1f corresponding to 6 o'clock (see FIG. 4). The through hole 1h can face the mark 7c for position detection.

As shown in FIGS. 1 and 4, since the mark 7c allows the outer peripheral portion of the front cover 7 to be visually recognized from the rear of the rear frame 1 through the through hole 1h, this mark 7c is visible through the through hole 1h. It can be seen that the front cover 7 is attached at the correct position if the position is coincident with. If the mounting position of the front cover 7 is misaligned, the presence or absence of the misalignment can be known from the position of the mark 7c, so the position should be corrected to the correct position.

Here, a procedure for correcting the displacement of the mounting position of the front cover 7 using the through hole 1h and the mark 7c will be described. FIG. 5 shows the procedure for alignment. As shown in FIG. 5 (a), when the position detection mark 7c is displaced from the through hole 1h, the front cover 7 is attached to the outer periphery of the through hole 1h. 5 and the inner surface of the mark 7c are aligned in the same direction, and when the position detection mark 7c disappears as shown in FIG. 5 (b), the screw 9 is tightened. 7 is fixed in the correct position.

In another embodiment, as shown in FIG. 6, two rectangular marks 17c are provided on the back surface of the front cover 17 as position detection marks on the outside of the hour display character 17b as an example of the time display means. , 17c are provided. In this case, as shown in FIG. 7 (b), if the distance between the two marks 17c is made to coincide with the inner diameter of the through hole 1h, when the front cover is slightly displaced, it will be ), One side of one mark 17c can be visually recognized from the through hole. When properly installed or corrected to the correct position, as shown in Fig. 7 (b), the inner side of the mark 17c on either side matches the inner diameter of the through hole 1h, making it invisible. ing.

In addition, the same effect can be obtained by appropriately changing the shape of the mark, the position of the through hole, and the like in response to changes in the design. Of course, the shape of the front cover is not limited to a circular shape, and the time display means may be printed on the front surface or the back surface, such as whether hour display characters, time scales or other decorative patterns are applied on the dial or the front cover. Allocation is left to design choices.

Although the present embodiment is applied to a wall clock, it is also applicable to a table clock and other timepieces.

[0020]

[Effect of device]

 According to the present invention, a mark for position detection is provided on the outer peripheral portion of the front cover provided with time display means, and the front cover is marked by a mark from the rear of the rear frame through a through hole provided in the rear frame. The attachment state of can be easily detected. For this reason, it is possible to easily correct the deviation of the mounting position of the front cover during or after the timepiece is assembled, so that it is not necessary to make a small hole in the front cover or to use a jig unlike the prior art. The front cover can be aligned with a simple operation, contributing to the cost reduction of the watch.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a timepiece according to the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a rear view of the front cover.

FIG. 4 is a partially enlarged cross-sectional view showing a relationship between a through hole of a rear frame and a position detection mark provided on a front cover.

FIG. 5 is an explanatory diagram showing a relationship between a through hole and a position detection mark.

FIG. 6 is a rear view of a front cover according to another embodiment.

FIG. 7 is an explanatory diagram showing a relationship between a through hole and a position detection mark.

[Explanation of symbols]

 1 Rear Frame 1h Through Hole 7 Front Cover 7a Outer Part 7b, 17b Time Display Means 7c, 17c Mark 8 Front Frame

Claims (1)

[Scope of utility model registration request] 1. A rear frame on which a timepiece mechanical body is mounted, a front frame provided on the front surface of the rear frame, and time display means are provided and an outer peripheral portion is held by the rear frame and the front frame. In the timepiece having the above-mentioned front cover, a mark for position detection is provided on the outer peripheral portion of the front cover, and a through hole for visually recognizing the mark is provided on the surface of the rear frame facing the outer peripheral portion. A watch characterized by being provided.