JPH0682596U - Watch module structure - Google Patents

Abstract

(57) [Abstract] [Purpose] In the timepiece module structure, it is possible to accurately position the circuit board without making the whole thick. [Structure] An interconnector 6 is arranged between a liquid crystal display panel 3 arranged on the lower surface side of the housing 1 and a circuit board 5 arranged on the upper surface side of the housing 1, and the circuit board 5 is mounted on the housing 1 with a main plate 12. It is a timepiece module structure that is fixed to the housing 1. A press-fitting hole 20 is formed in the housing 1, and a positioning pin 23 whose one end protrudes from the upper surface of the housing 1 is movably press-fitted into the press-fitting hole 20 and the housing 1 is inserted in the circuit board 5. Is formed with the positioning holes 9 into which the upper ends of the positioning pins 23 protruding from the upper surface of the circuit board 5 are inserted.
After fixing to the housing 1 with 2, the positioning pin 2
3 is moved to the lower side so that the protruding height of the positioning pin 23 is lowered.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a timepiece module structure, and more particularly to a circuit board positioning structure incorporated in a timepiece module.

[0002]

[Prior art]

 Conventionally, a timepiece module incorporated in an electronic wristwatch is configured as shown in FIG. That is, a housing hole 2 is provided in the center of the housing 1. A liquid crystal display panel 3 for displaying information such as time and date is disposed in the housing hole 2 while being supported by a collar portion 4 provided below the inner surface of the housing hole 2. A circuit board 5 is arranged on the upper surface side of the housing 1 between the liquid crystal display panel 3 and an interconnector 6. In this case, a plurality of bosses 7 (two in the figure, but actually four) are provided on the upper peripheral edge of the housing 1 so that the bosses 7 having the tapered portions 8 project upward. The boss 7 is inserted into the positioning hole 9 provided in the circuit board 5, so that the electrode 10 provided on the lower surface of the circuit board 5 and the electrodes 11 provided on both upper surfaces of the liquid crystal display panel 3 are separated from each other. This is for positioning the circuit board 5 so as to face each other. In this circuit board 5, a hook 13 provided at an end portion of a main plate 12 arranged on the upper surface is engaged with an engaging projection portion 14 provided on a side surface of the housing 1 to compress the interconnector 6 and It can be attached to 1. As a result, the liquid crystal display panel 3 is pressed and fixed by the interconnector 6 against the collar portion 4 in the housing hole 2. The interconnector 6 is a zebra-type elastic member (see FIG. 6) in which conductive rubber 6a and insulating rubber 6b are alternately laminated. It is formed at a protruding height (see Fig. 5). An LSI 15 is provided on the lower surface of the circuit board 5 so as to correspond to the liquid crystal display panel 3.

[0003]

[Problems to be solved by the device]

 However, in the timepiece module structure described above, when the circuit board 5 is arranged on the housing 1, the upper portion of the interconnector 6 slightly projects from the upper surface of the housing 1 as shown in FIG. Will be arranged above the housing 1 in a floating manner. For this reason, since the taper portion 8 at the upper end of the boss 7 is merely inserted into the positioning hole 9 of the circuit board 5, there is play between the taper portion 8 and the positioning hole 9, and accurate positioning cannot be performed. The electrodes 10 of the circuit board 5 and the electrodes 11 of the liquid crystal display panel 3 are displaced, and the conductive rubber 6a of the interconnector 6 interposed between the circuit board 5 and the liquid crystal display panel 3 becomes the circuit board. The electrode 10 of No. 5 and the electrode 11 of the liquid crystal display panel 3 may not come into contact with each other. When the circuit board 5 is pressed against the housing 1 with the base plate 12 in this state and attached, the circuit board 5 moves horizontally by the amount of play between the taper portion 8 and the positioning hole 9 and the boss 7 is removed. The electrode 10 of the circuit board 5 and the electrode 11 of the liquid crystal display panel 3 face each other as shown in FIG. 6 by fitting in the positioning hole 9, but the interconnector 6 has a large friction coefficient, and therefore the circuit board 5 has a large friction coefficient. Since the conductive rubber 6a is deformed as it moves in the horizontal direction, the conductive rubber 6a is attached to the electrode 10 of the circuit board 5 and the electrode 11 of the liquid crystal display panel 3 without making contact with the electrode 10 of the circuit board 5. There is a problem that the electrodes 11 of the liquid crystal display panel 3 cannot be reliably electrically connected. Although it is conceivable to form the boss 7 high in order to solve such a problem, if the boss 7 is simply formed high, the entire timepiece module becomes thick.

An object of the present invention is to provide a timepiece module structure in which the entire timepiece module is not thickened and the circuit board can be accurately positioned.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a housing, a display panel arranged on one side of the housing, a circuit board arranged on the other side of the housing, and a space between the display panel and the circuit board. Has an elastic interconnector and a fixing member for fixing the circuit board to the housing.A press-fitting hole is formed in the housing, and a pin whose one end projects from the other surface of the housing is formed in the press-fitting hole. The circuit board is held so that it can move in the retracted direction, and a positioning hole into which one end of the pin protruding from the other surface of the housing is inserted is formed in the circuit board. The feature is that it is moved to lower the protruding height of the pin.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. In this case, the same parts as those in the conventional example described above are designated by the same reference numerals, and the description thereof will be omitted. As shown in FIG. 1, a liquid crystal display panel 3 is arranged in the housing hole 2 of the housing 1 so as to be supported by a collar portion 4 provided on the lower portion of the inner surface of the housing hole 2. Interconnectors 6 are arranged on both upper surfaces of the liquid crystal display panel 3, and a circuit board 5 is arranged on the interconnectors 6. On the other hand, a press-fitting hole 20 is formed vertically through the housing 1. The press-fitting hole 20 has a small-diameter portion 21 on the upper side and a large-diameter portion 22 on the lower side. A positioning pin 23 having an upper end protruding from the upper surface of the housing 1 is press-fitted in the press-fitting hole 20 so as to be vertically movable. . The positioning pin 23 is to be inserted into the positioning hole 9 of the circuit board 5, has an outer diameter substantially the same as the inner diameter of the small diameter portion 21 of the press-fitting hole 20, and has a tapered portion 24 formed at the upper end thereof. The lower end is formed with a collar portion 25 that is loosely fitted in the large diameter portion 22. In addition, the positioning pin 23 is inserted into the positioning hole 9 of the circuit board 5 from the upper surface of the housing 1 with the collar portion 25 in contact with the step portion 26 of the large diameter portion 22 and the small diameter portion 21, and the upper end thereof. The taper portion 23 is formed to have a length protruding from the upper surface of the circuit board 5.

Next, with reference to FIGS. 1 to 3, a case of assembling the above-mentioned timepiece module will be described. In advance, as shown in FIG. 1, the collar portion 25 of the positioning pin 23 is brought into contact with the stepped portion 26 of the press-fitting hole 20 so that the positioning pin 23 is sufficiently projected above the housing 1. In this state, the positioning pin 23 is press-fitted into the small-diameter hole 21, so that the positioning pin 23 does not descend freely. Then, the liquid crystal display panel 3 is arranged in the housing hole 2 of the housing 1 and supported by the collar portion 4, and the interconnectors 6 are arranged on the upper surfaces of both sides of the liquid crystal display panel 3, respectively. Place 5. At this time, since the positioning pin 23 projects sufficiently high above the housing 1, the tapered portion 24 at the upper end of the positioning pin 23 is inserted into the positioning hole 9 of the circuit board 5 and is guided by the tapered portion 24. However, the positioning pin 23 can be fitted into the positioning hole 9 of the circuit board 5. As a result, the circuit board 5 is positioned by the positioning pin 23, the electrode 10 of the circuit board 5 and the electrode 11 of the liquid crystal display panel 3 can be accurately opposed to each other, and the conductive rubber 6a of the interconnector 6 is connected to the circuit. The electrode 10 of the substrate 5 and the electrode 11 of the liquid crystal display panel 3 can be surely made to correspond to each other.

After that, as shown in FIG. 2, the housing 1 is placed on the pedestal 30, and the receiving protrusions 31 provided on the pedestal 30 so that the positioning pins 23 are not pushed down. It is inserted into the large diameter portion 22 of the press-fitting hole 20. In this state, the base plate 12 is arranged on the circuit board 5, and the hooks 13 of the base plate 12 are locked to the locking protrusions 14 on the side surface of the housing 1. Then, the circuit board 5 is pressed by the base plate 12, and is pressed down while being guided by the positioning pins 23 fitted in the positioning holes 9 of the circuit board 5, thereby compressing the interconnector 6. Therefore, the circuit board 5 is pushed down without moving horizontally as in the conventional case, the interconnector 6 is compressed only in the vertical direction, and the liquid crystal display panel 3 is pressed against the collar portion 4 in the housing hole 2 and fixed. It As a result, the interconnector 6 is attached between the circuit board 5 and the liquid crystal display panel 3 with the conductive rubber 6a of the interconnector 6 pressed against the electrode 10 of the circuit board 5 and the electrode 11 of the liquid crystal display panel 3. Therefore, the electrode 10 of the circuit board 5 and the electrode 11 of the liquid crystal display panel 3 are reliably connected to each other by the interconnector 6.

After that, the timepiece module is assembled in the wristwatch case 32 shown in FIG. In this case, first, the watch module is inserted from above and arranged in the watch case 32 having the watch glass 33 attached to the lower part. At this time, the taper portion 24 at the upper end of the positioning pin 23 projects upward from the main plate 12, but when the back lid 35 is attached to the upper portion of the wristwatch case 32 via the waterproof ring 34, the back lid 35 is used to As shown in FIG. 3, the positioning pin 23 is pushed down along the press-fitting hole 20, so that the protruding height of the positioning pin 23 becomes low. Therefore, even when the positioning pin 23 protrudes high from the housing 1 for accurately positioning the circuit board 5 when the timepiece module is assembled, the positioning pin 23 is inserted into the press-fitting hole 20 when assembled in the wristwatch case 32. Since the protrusion height can be lowered by pushing down, the thickness of the entire timepiece module can be made thinner than that at the time of assembly.

The present invention is not limited to the above-mentioned embodiment. For example, the press-fitting hole 20 does not necessarily have to be formed in a stepped shape between the small diameter portion 21 and the large diameter portion 22, and the small diameter portion 21 may pass through the housing 1 in the vertical direction, or may not pass through in the vertical direction. It may be a hole. Further, the positioning pin 23 does not necessarily have to be press-fitted into the press-fitting hole 23, and may be structured such that it is biased upward by an elastic member such as a coil spring.

[0011]

[Effect of device]

 As described above, according to the present invention, one end of the pin, which is held in the press-fitting hole of the housing so as to be movable in the retracting direction, is sufficiently projected from the other surface of the housing, and one end of the pin is connected to the circuit. Since it is inserted into the positioning hole of the board, the circuit board can be accurately positioned with respect to the housing, and the electrodes of the circuit board and the electrodes of the display panel can be accurately opposed to each other. The arranged interconnector can connect the electrodes of the circuit board and the electrodes of the display panel securely, and after fixing the circuit board to the housing with the fixing member, move the pins to reduce the protruding height. Therefore, the thickness of the entire timepiece module when assembled in the timepiece case can be made thinner than that at the time of assembling the timepiece module.

[Brief description of drawings]

FIG. 1 is a sectional view showing a state in which a circuit board is positioned in a housing of a timepiece module of the present invention.

FIG. 2 is a cross-sectional view showing a state where a circuit board is fixed by a ground plane.

FIG. 3 is a cross-sectional view showing a state in which the timepiece module is incorporated in a wristwatch case.

FIG. 4 is a sectional view of a conventional timepiece module.

FIG. 5 is a sectional view showing a state in which a circuit board is positioned in a conventional housing.

6 is a cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

 1 Housing 3 Liquid Crystal Display Panel 5 Circuit Board 6 Interconnector 9 Positioning Hole 12 Main Plate 20 Press-fitting Hole 23 Positioning Pin

Claims (1)

[Scope of utility model registration request] 1. A housing, a display panel arranged on one surface side of the housing, a circuit board arranged on the other surface side of the housing, and an elasticity arranged between the display panel and the circuit board. An interconnector having
A fixing member for fixing the circuit board to the housing, and a press-fitting hole is formed in the housing, and a pin whose one end protrudes from the other surface of the housing is movable in the retracting direction. The circuit board is formed with a positioning hole into which one end of the pin protruding from the other surface of the housing is inserted, and the circuit board is fixed to the housing by the fixing member, and the pin is attached to the housing. A timepiece module structure characterized in that the protruding height of the pin is lowered by moving the pin.