JPS6244384Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is to rotate the main shaft in the time setting direction at a constant speed using the action of a clock mechanism provided inside the case after rotating the main shaft in the time setting direction. This invention relates to a timer, and more specifically, to a light winding mechanism interposed in a gear train that operatively connects the main shaft and a clock mechanism.

Conventionally, timers equipped with a light winding mechanism have the convenience of allowing time settings to be made very easily. However, because the shaft end of the escape gear in the light winding mechanism must be pressed extremely lightly with a spring,
There is the problem of having to install a very fine spring inside the case. Furthermore, because the spring is so small, tools such as tweezers must be used to install it. Furthermore, if a relief gear is provided in the case when installing a spring, that gear will get in the way and hinder the spring installation process, and if there is no relief gear, the spring will lose its attachment target and cannot be attached. There is a point.

Therefore, the present invention is configured so that the spring can be installed even when there is no escape gear, and that the spring action can be applied in a subsequent process to the escape gear that is installed after the spring installation is completed. The present invention aims to provide a light winding mechanism for a timer.

The drawings showing the embodiments of the present application will be described below. Reference numeral 1 denotes a case, which is composed of a case body 2 and a lid 3, each of which is integrally formed using a plastic material. Reference numeral 5 denotes a main shaft, which is rotatably attached to the case body 2 and the lid body 3. 6 is a cam attached to the main shaft 5 so as to rotate integrally with the main shaft 5, and 7 is a cam arm attached to the case body 2 so as to be able to swing freely.
It is provided with a presser foot 7a which is movably in contact with the presser foot 7a and is capable of stopping the tempura, which will be described later.
Reference numeral 8 denotes a contact point mounted on the case body 2, which is movably opposed to the cam arm 7 as is well known. Next, reference numeral 9 is a gear fixed to the main shaft 5, and 10 is a well-known gear train formed by meshing a large number of gears with each other, one end of which is meshed with the gear 9. 11 is the case body 2
A clock mechanism is equipped on the main shaft 5, and is connected to the other end of the gear train 10 so as to be interlocked with the main shaft 5, and is also composed of a well-known escape wheel 12 and a crown 13. Next, reference numeral 15 indicates a light winding mechanism interposed in the gear train 10. In this light winding mechanism 15,
16 is a relief gear, like a normal gear, spur gear 1
8, a gear portion such as a pinion 19 and a support shaft 17 for rotatably supporting the gear portion are integrally formed. The spur gear 18 is meshed with the next stage gear (mating gear) 10a, and the pinion 19 is meshed with the gear 9. Also, both shaft ends 17 of the support shaft 17
As clearly shown in FIG. 7, a and 17b are located in long groove-shaped bearing holes 20a and 20b formed in the lid body 3 and the case body 2, respectively, so as to be able to freely reciprocate in the direction of the arrow. Incidentally, one of the bearing holes 20a is formed in a bearing body 14 formed by forming the inner surface of the lid body 3 into a bulging shape. 21 is a fulcrum member for spring support provided integrally with the lid body 3, and 22 is a retaining piece provided at the free end of the fulcrum member 21 so as to protrude in one direction, and is formed in the shape as shown in FIG. However, both may be formed integrally. Reference numeral 23 denotes a positioning portion integrally provided on the lid 3, which determines the position of a spring 27 (the height position of the fulcrum member 21 in the axial direction), which will be described later. A receiving member 24 for receiving a spring is provided integrally with the lid 3, and a recess 25 is formed in a part of the receiving member. Note that 24' is a hole for punching out a mold from plastic molding. Reference numeral 26 denotes a temporary fixing member, which is constructed as a part of the bearing body 14, and which is attached to the first part of the spring 27, which will be described later.
It is located near the end location. Next 27
1 is a spring that always urges the shaft end of the support shaft 17 in the direction of the fixed position in the relief gear, and uses a V-shaped spring similar to that normally used. In this spring 27, reference numeral 28 indicates a coil portion formed in the middle, and 29 and 30 indicate a first end portion and a second end portion extending from the coil portion 28, respectively. 31 is an operation window bored in the lid body 3, as shown in FIG.
As shown in FIGS. 4, 5, and 6, the spring 27 is formed at a position close to the first end 29 (for example, at a position overlapping a part of the first end 29). Also, the size of the window 31 is
It is preferable to make it small enough to allow insertion of an operating rod, which will be described later. The main dimensions of the fulcrum member 21, retaining piece 22, and spring 27 may be related to each other as follows (see FIG. 9).

(Dimension is formed at a slight distance from the bearing body 14 so that the end portion 29 does not rub (do not touch) the upper flat surface of the bearing body 14.

Next, the assembly procedure of the above structure will be explained. First, the main shaft 5, tooth train 10, clock mechanism 11, etc. are attached to the case body 2 in a well-known manner. On the other hand, a spring 27 is temporarily attached to the lid 3 in an open state (without any mechanism) as shown in FIG. 2, as shown in FIGS. 3 and 4. This spring mounting is performed by moving the coil portion 28 in the direction of arrow C from the state shown in FIG.
It is attached to the fulcrum member 21 via 2. Further, the second end 30 is inserted into the recess 25 of the receiving member 24, and the first end 29
are brought into elastic contact with the temporary fixing member 26, respectively, and the fourth
Put it in a temporary state as shown in the figure. Next, as is well known, the lid 3 is placed over the case body 2. In this case, it goes without saying that the shaft end of each gear in the gear train 10 must be properly mounted on each bearing of the lid 3 as shown in FIG.

Next, with the case 1 closed as described above, the operating rod 32 (the tip of a screwdriver or any other tapered rod may be used) is operated as shown in FIGS. 4, 6, and 7. As shown in the figure, by inserting the spring into the operation window 31 from the outside and simply pressing the first end 29 of the spring temporarily fixed to the temporary fixing member 26 and removing it from the temporary fixing member 26, the end 29 can be removed. As shown in FIGS. 5 and 1, the shaft end 17a of the support shaft 17
comes into contact with. By doing this, the support shaft 1
7 is a spring 2 as shown in FIGS. 1 and 5.
It is held in place by 7 auxiliary forces. Furthermore, the degree to which the first end portion 29 engages with the support shaft 17 can be easily confirmed through the window 31.

Next, as shown by the two-dot chain line in FIG. and the case body 2 are fastened together. In this case, it goes without saying that mainspring 3
The center portion of the main shaft 5 is connected to the shaft end of the main shaft 5 .

Next, for the timer assembled as described above, move the main shaft 5 in the time setting direction A as shown in Figure 1.
When the escape gear 16 is rotated to , the relief gear 16 is dragged along by the gear 9 which rotates integrally with the main shaft 5 as in a normal gear, and the gear 16 is moved in the direction of arrow D against the biasing force of the spring 27. , move to the retreat position as shown by the two-dot chain line. As a result, the spur gear 18 in the relief gear 16 and the adjacent gear 10a in the gear train 10 are disengaged. Therefore, the main shaft 5
can be rotated in the time setting direction A even with a light force. Next, when the above settings are completed and the hand is released from the main shaft 5, the main shaft 5 is rotated in the timed rotation direction B in FIG. 1 by the biasing force of the mainspring 35. In this case, the support shaft 17 of the relief gear 16 is moved in the direction of arrow E by the urging force of the spring 27, and the relief gear 16 is moved to the home position shown by the solid line. As a result, the spur gear 18 is brought into mesh with the gear 10a, and as a result, the main shaft 5 rotates a certain amount by the action of the clock mechanism 11, and a well-known timed operation is performed.

In the above embodiment, the spring 27 is connected to the lid 3.
Although an example of a configuration is shown in which the device is attached to the case body 2, it may also be attached to the case body 2. In this case, for example, the shaft end 17b of the support shaft 17 of the escape gear 16
by forming the case body 2 longer than shown in the figure.
The shaft end 17b may be exposed between the case body 2 and the pinion 19, and the first end of the spring attached to the case body 2 may be brought into contact with the shaft end 17b. Alternatively, the relief gear 16 can be turned upside down from the state shown in FIG. 7, and the gear 9 fixed to the main shaft can also be moved to a position where it can mesh with the pinion 19 accordingly. The shaft end of the support shaft 17 of the relief gear 16 on the spur gear side may be biased by a spring attached to the case body 2. In addition, spring 27
It goes without saying that the temporary attachment is performed while the case body 2 is in an open state before the escape gear 16 and other gears are attached. Furthermore, as a matter of course, the operation window 31 is formed in the case body 2 at a position close to the first end of the spring.

Further, the spring 35 may be attached to the outside of the case body 2 (on the upper side in FIG. 8) instead of the outside of the lid 3 as shown in FIG. In this case, if the operation window 31, hole 24', etc. are covered with an arbitrary covering member, the role of dustproofing the interior can be fulfilled in the same way as the barrel.

Although the above description has been made regarding a spring-type timer, the present invention can be implemented in the same manner in the case of a so-called motor-type timer configured using a timer motor as the clock mechanism 11. In this case, it goes without saying that the mainspring shown in FIG. 8 is not used.

As mentioned above, in this invention, the tooth gear train 10
The light winding mechanism 15 is interposed therein, and when the main shaft 5 is rotated in the time setting direction, the shaft end of the escape gear 16 in the light winding mechanism 15 moves to the retracted position. Stuck gear 9
Even if the clock mechanism 11 is connected to the clock mechanism 11 through the gear train 10, there is an operational effect that the main shaft 5 can be rotated very easily in the time setting direction. .

Moreover, in order to obtain the above-mentioned operational effect, a complicated structure is interposed in the gear train, such as by providing a spring 27 that biases the shaft end of the relief gear 16 in the stationary direction. However, in the present invention, the spring 27, which takes a lot of effort to install, can be temporarily tightened even before the relief gear is attached. This has the effect that the spring installation work can be carried out in an open state where the tooth train 10 is not attached to the case 1.
Since the spring 27 is temporarily fixed to the case in advance, it is possible to mount a large number of gears closely to the case, which has the effect of making the timer case more compact. There is. Furthermore, in the present invention, as described above, a large number of gears are tightly attached to the case, and the operating rod 3 is inserted from the gear mounting side to the position where the spring 27 is present.
2 cannot be reached or the case is closed, a part of the spring 27 can be operated through the operation window 31 provided in the case.

This means that the temporarily attached spring 27
The first end 29 of the first end 29 can be removed from the temporary fixing member 26 and brought into contact with the shaft end of the escape gear 16, etc.
The effects brought about by the unique structure of the present invention are beneficial in various aspects. To further explain the above point, when the second end 29 which is temporarily fixed to the temporary fixing member 26 is removed from the temporary fixing member 26 and brought into contact with the support shaft 17 of the gear 16, the operation rod is inserted through the operation window. 32, the second end 29 is removed from the temporary fixing member 26 by simply pushing it inward of the case consisting of a pair of case elements (case body 2 and lid 3), and the first end 29 is released from the spring 27. Due to the spring force, it comes into contact with the support shaft 17, which has the effect of allowing the above-mentioned operation to be performed with a single touch.

Moreover, in the above case, even if the first end 29 is pushed inward of the case, the spring 27 has its coil portion 28 attached to the fulcrum member 21 so that the first end 29 is close to the inner surface of the case element 3. Since it is attached, when the first end 29 comes off the temporary fixing member 26, the first end 29 moves toward the support shaft 17 along the inner surface of the case element, crossing the pushing direction.
It has the feature that it comes into contact with the support shaft 17 at a position close to its shaft end. This means that the first end 29 is
In order to push the position near the shaft end of the gear 10a, it is possible to apply a large force to the gear part 18 located in the middle part of the gear 16 to bring it into mesh with the other gear 10a using the lever principle. This has the effect of making it possible to achieve a reliable meshing state.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, in which Fig. 1 is a plan view of the timer with a part of the case cut away, Fig. 2 is a perspective view of the lid of the case as seen from the inside, and Figs. Figure 5 is an enlarged perspective view illustrating the assembly of the spring, Figure 6 is a partially cutaway perspective view from the outside showing the relationship between the spring and the operating rod in the temporarily secured state, and Figure 7 is the spring in the temporarily secured state. Figure 8 is a partial view of Figure 7 showing the spring in a predetermined position, Figure 9 is a fulcrum member and spring. An explanatory diagram of dimensional relationships such as. 1...Case, 5...Main shaft, 10...Tooth gear train,
11... Clock mechanism, 15... Light winding mechanism, 16...
Relief gear, 27... Spring, 29... First end, 30... Second end, 21... Fulcrum member, 24
... Reception member, 26 ... Temporary fixing member, 31 ... Operation window.

Claims (1)

[Scope of utility model registration request] A main shaft is rotatably mounted on a pair of case elements arranged to face each other, and a clock mechanism is connected to the main shaft via a gear train arranged between the pair of case elements. In addition, one end of the support shaft of one gear in the gear train reciprocates between a home position where the gear portion of the gear meshes with another gear and a retracted position where the gear disengages. The support shaft is located in a long groove-shaped bearing hole formed in one of the case elements so as to be able to move, and a spring is attached to the one case element to bias one end of the support shaft to a fixed position. In the light winding mechanism of a certain timer, the spring is composed of a coil portion and first and second ends extending from one end and the other end thereof, respectively, and the structure of attaching the spring to the case element is such that the spring is attached to the upper end. A fulcrum member having a retaining piece is provided protruding from the inner surface of the one case element, and a coil portion of the spring is arranged around the fulcrum member, and the first end portion is positioned near the inner surface of the one case element. and attach it with the second end located far away,
Furthermore, the first end portion is a temporary fixing member that protrudes from the inner surface of the one case element toward a side opposite to the direction in which the support shaft moves from the retracted position to the home position, with respect to the bearing hole. The second end of the spring is received from the inner surface of one of the case elements, while the second end of the spring is held from the inner surface of the one case element. The spring has a biasing force that causes the first end of the receiving member having a concave portion to be moved from a state in which the first end contacts the temporary member to a state in which the first end contacts the support shaft. The spring is attached to the one case element by protruding the second end of the spring at a position where it can be received, and bringing the second end into contact with the recess of the receiving member. Further, in one of the case elements, an operation for pushing and removing the first end of the spring temporarily fixed to the temporary fixing member from outside the case is provided at a location near the location where the first end of the spring remains. A light winding mechanism in a timer characterized by being equipped with a window.