CN1028135C - Inner Shield Connection Clamp - Google Patents

Abstract

A joining clip for joining an inner shield of a cathode ray tube with a frame case, comprising: a head shaped for pressing: depressed portions extending from bottom corners of the head portion, the depressed portions being bent at an acute angle away from a center line of symmetry of the attachment clip at a distance from the bottom corners; shoulder portions extending from the depressed portion, the shoulder portions being bent at an obtuse angle away from a symmetrical center line of the connecting clip at a distance from a bent point of the depressed portion; legs extend downwardly from the shoulder portion.

Description

The present invention relates to a connecting clip for connecting an inner shield to a casing of a cathode ray tube.

A cathode ray tube, especially a mask type ray tube, has a frame for mounting a mask. The frame is used not only for mounting a mask but also for mounting an inner shield to shield the influence of the earth's magnetic field.

Due to the structural characteristics of the frame case and the inner shield, it is impossible to manufacture them integrally, and therefore, they are manufactured separately, and their bonding is performed during the assembly process. The connection clip is a part required to connect the frame shell and the inner shield in the assembly process, and the connection clip must meet the following three conditions. First, the connecting clip must have sufficient coupling capacity. Under the action of external force, the inner shield should not oscillate or vibrate; second, the connection clip should have better production efficiency; third, the connection clip should be easy to connect the inner shield and the frame shell.

As shown in FIG. 1 , the traditional connecting clip structure includes: a V-shaped elastic part A with its own elasticity; a pair of shoulders S extending symmetrically from the elastic part A to the opposite direction. A pair of shanks B extend from the shoulder S. When the inner shield I and the frame shell F are stacked and combined together, the fixing hole H is matched with the frame shell F, and then the connecting clip is inserted into the fixing hole, so that the frame shell and the inner shield are connected to the elastic part A and shoulder S.

An example of this conventional connecting clip has been disclosed in Japanese Patent Application Publication No. Sho 55-154041, and another example is Japanese Patent Application Publication No. Sho 62-13787.

Fig. 2 shows a connection clip in Japanese Patent Publication No. Sho 55-154041. According to this device, by inserting some elastic supporting members into the holes formed in the baffle frame shell and the magnetic shielding member, Fix together the baffle frame shell holding the baffle and the magnetic shielding part that shields the external magnetic field. These elastic supporting parts are constituted like this, and they have V-shaped structure; There is the depressing part 21 that protrudes inwardly in the middle part of its every side; An introduction end part 25 extends to the bent part 22 that has an acute angle; V-shaped connection Each rear end portion 24 of the clip extends to another pair of bent portions 23 which are externally arranged to the depressing portion 21, and this connecting clip is used in a color picture tube.

Fig. 3 illustrates another example of the prior art, Japanese Patent Publication No. Sho 62-13787, which device is used in a mask type color picture tube. This device is in the form of a V-shaped spring member having a bend 31 and a pair of necks 32 snapped into holes in a support frame and a shielding member. Before and after this neck portion 32, first and second shoulders 33 and 34 are respectively provided, wherein the first shoulder portion 33 is located between the bend 31 and the neck portion 32, and the width of the second shoulder portion 34 is greater than that of the first shoulder portion. The width of a shoulder portion 33 .

Both of the above-mentioned prior art examples focus on two of the aforementioned three conditions, that is, they focus on the connecting ability and productivity of the connecting clip, but ignore the practicality of the connecting clip.

The connecting clips of the above two examples are in a gentle V shape, and the connecting clips are manually installed. Since the parts grasped by the workers, that is, the two ends of the V-shaped connecting clips are slope-shaped, they are easy to slip out of the hands of the workers. If the clip slips out of the worker's hand when grasping it, the clip will pop out due to its own elasticity, delaying processing and causing lost components.

The present invention is proposed in order to overcome the above-mentioned shortcoming of conventional device.

Therefore, the object of the present invention is to provide an inner shield connection clip, which has the advantages of strong connection ability, high production efficiency, good practicability, and saving of raw materials.

In order to achieve the above object, the inner shielding connection clip of the present invention comprises: a head, making it shaped to be pressed; The lower portion also has an acute angle that flares outwardly away from the centerline of symmetry of the head; a pair of shoulder portions extending from the depressed portion have a centerline of symmetry toward the trapezoidal head. An obtuse angle of inward flare; some leg extending downwardly from said shoulder portion. This construction has the advantage that the ends of the legs are gently bent outwards, although this is not an absolute prerequisite.

The above objects and other advantages of the present invention will be more clearly understood by referring to the accompanying drawings and the detailed description of the preferred embodiments of the present invention.

Fig. 1 is a perspective view of a conventional frame shell connection clip, and its state of use;

Fig. 2 is a sectional view showing a coupling condition between a frame case and a shield using a conventional connection clip.

Fig. 3 is a sectional view showing a coupling state between a frame case and an inner shield using another conventional connection clip.

Fig. 4 is a perspective view showing a first embodiment of the present invention;

Fig. 5 is a sectional view showing a connection state between a frame case and an inner shield when utilizing the connection clamp of the first embodiment of the present invention;

6a to 6c are some sectional views schematically illustrating the process of inserting the connecting clip into the fixing hole according to the first embodiment of the present invention;

7a to 7b are a perspective view and a sectional view schematically showing the structure of the second embodiment of the present invention and the process of inserting the connecting clip into the fixing hole;

8a to 8c are sectional views schematically showing third to fifth embodiments of the present invention.

FIG. 4 shows a perspective view of the connecting clip according to the first embodiment of the present invention. It can be seen from the figure that a head 1 of the connecting clip is roughly trapezoidal, but the bottom edge of the trapezoidal head 1 is not located on a strict horizontal line. From the perspective view of Fig. 5, it can also be seen that when the connection clip is fixed in those holes of an inner shield and a frame shell, the bottom edge of the trapezoidal head, that is, the overlap of the head and the depressing part 2 The common part is in contact with the upper surface of the inner shield, therefore, the angles of the left and right base angles of the trapezoidal head depend on the connection state of the connecting clip.

The lower portion of the depressing portion 2 extends for a certain length, and then, is bent at an acute angle to form shoulder portions 3 . The lower portion of the shoulder portion 3 further extends downwards to form some legs 4, but the legs 4 do not have to be strictly parallel to the center line of symmetry of the connecting clip.

Figures 6a to 6c show the process in which the connection clips of the present invention are fitted into those fixing holes formed on the inner shield and the frame shell, at first, as shown in Figure 6a, the two legs 4 are pressed inwardly, and in this state Insert the connecting clips into those fixing holes. Then, as shown in FIG. 6b, the head 1 of the connecting clip is pushed down, so that the inner shield and the frame shell are fixed between the bottom of the head 1 and the shoulder portion 3, as shown in FIG. 6c. One of the most important features of the invention lies in the fact that the connection between the inner shield and the frame can be easily realized.

If the ends of the legs 4 are gently bent outwardly away from the center line of symmetry, the first step of the above-mentioned connection process will be greatly eased. In addition, if one of the legs 4 is made longer than the other, the first step of the connection process can be lightened. Fig. 7a shows a perspective view of a second embodiment of the present invention having such a feature. Fig. 7b Then, the process of inserting the connecting clip into those fixing holes is shown. In this case, the long legs 4 are first inserted into those fixing holes, and then, after bending in the direction shown by the arc arrow in FIG. 7 b , insert the short legs 4 .

In the above-mentioned embodiments of the present invention, the portions to which elasticity is applied are the left and right upper corners of the head 1 .

Figures 8a to 8c also show several other embodiments of the present invention. The third embodiment of the present invention shown in FIG. 8a is generally similar to the first embodiment, except that the two legs 4 of the connecting clip of the third embodiment are in contact with each other in a free state. Due to such a structure, the elastic force is applied to the entire length of the legs 4 so that the inner shield and the frame shell can be connected more firmly, while the first and second embodiments apply elastic force because their two legs are opened. The position of the elastic force is the left and right upper corners of the head 1 .

The fourth embodiment shown in FIG. 8b is similar to the first embodiment in general, except that the head 1 is not trapezoidal but half-moon. However, such a structure makes the part where the elastic force is applied be the entire arc portion of the half-moon head. That is, in the case of a half-moon-shaped head, the bending stress of the part is distributed over the entire arc, while in the case of a trapezoidal head, the bending stress of the part generated during connection is concentrated in the upper left and right corners superior. Therefore, the final effect of the fourth embodiment is to enhance the strength and reliability of the connecting clip from the perspective of material mechanics.

The fifth embodiment shown in Figure 8c is a combination of the aforementioned third and fourth embodiments. It can be seen from the figure that the lower ends of the two legs are in contact with each other, and their heads are half-moon-shaped. According to this fifth embodiment, the advantages of strong connection of the third embodiment and the advantages of bending strength and reliability of the fourth embodiment can be obtained.

The advantage of connecting clip of the present invention can be summed up as follows, at first, utilize With such a connection clip, it is easier to connect the shield and the housing within the connection. Second, the connecting force of this connecting clip is very strong, and third, from the viewpoint of material mechanics, the strength and reliability of this connecting clip are very high. In addition, the mass of the connecting clip of the present invention is only about 2/3 of that of the prior art connecting clip described in this specification, therefore, the intended purpose is achieved with a smaller connecting clip, thereby saving material cost.

Claims (6)

1. An inner shield connection clip for a cathode ray tube, comprising: a head that makes the connection clip have an elastic coupling force, and some fixing parts that enable the connection clip to be embedded and formed on the inner shield and the frame shell A depressing portion in the hole, some shoulder portions adjacent to said depressing portion, and some legs extending downward from said shoulder portion; characterized in that said head is shaped to be pressed down, so Said that the connecting clip is bent into an acute angle away from the center line of symmetry of the connecting clip at the depressing part, and bent into an obtuse angle toward the center line of symmetry at the shoulder part, when the connecting clip is inserted into the fixing hole, the The leg guides said connection clips. 2. The inner shield connection clip according to claim 1, wherein the ends of the legs are gently bent away from the symmetrical center line of the connection clip. 3. The inner shield connection clip according to claim 2, wherein one of said legs is longer than the other leg. 4. The inner shield connection clip according to any one of claims 1 to 3, wherein the lower ends of said legs are in contact with each other. 5. The inner shield connection clip according to any one of claims 1 to 3, wherein the head is trapezoidal. 6. The inner shield connection clip according to any one of claims 1 to 3, wherein the head is half-moon shaped.

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