JPS60106193A - Supporting structure for opening and closing upper cover of housing - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field of the Invention The present invention relates to a top cover of a casing that opens and closes downward.
The moment generated by the own weight of the top lid, which is fixed at the fulcrum at θ111, is greater than the moment generated by the spring mechanism in the fully opened state, and the moment generated by the spring mechanism and the own weight are used in the middle of the process except near the closed and fully opened states. This invention relates to an improved support structure for opening and closing the top cover of a casing, which realizes a so-called auto-hinge cover that can be stopped at any arbitrary position in the middle of opening and closing by configuring the moment to be approximately balanced. .

Tb) Prior art and background Conventionally, the vertical opening/closing cover, which can be balanced and stopped at any position in the middle except near the open and closed states, has been used by the operator when opening/closing a relatively large cover is required. It is often used to improve usability. One reason for this is that when lifting the cover, the large size of the cover is too heavy for humans to ignore, and the other is that the links that are folded in the closed state, which are normally used in the past, are folded in a straight line in the open state. In a structure that supports the cover by expanding it near the fulcrum of the link, or in a structure that supports the moment due to the weight of the cover when it is open by locking the extendable bar in the extended state, the cover may be stopped midway. If you fail to open the cover, or if you do an incomplete operation such as not opening it completely, the cover will fall without stopping in the open position, and the cover may fall and hit the operator's head or pinch his or her hand. This is because there remains a risk that the

Therefore, one structure that does not have these drawbacks is the so-called auto-hinge cover, which is excellent in terms of improving operability when the operator opens and closes it, but it has a somewhat complicated structure and is somewhat large. This problem occupies a non-negligible amount of space on the sides of the casing, making it difficult to downsize the entire device including the casing because the space between the sides of the device and the casing is occupied in the middle direction. was there.

The structure of conventional auto hinge covers is as follows:
For example, as shown in FIGS. 1 and 2, there is an arm 4 having a pivot point at its tip on the side of the upper lid 2 which is connected by a hinge 3 to a housing 1 in which the device 10 is mounted, and the arm 4 has a pivot point at the tip. 6
There is an intermediary link spring between the two pivot points 5 and 6 which has a built-in spring means and is biased in the direction of extension and can be expanded and contracted by an external force between a predetermined minimum length and a predetermined maximum length. 7
By supporting and canceling out the force in the cover closing direction (force generated by moment) generated by the cover with the force in the extension direction of the intermediate link spring 7, when the cover is half-closed, which is the intermediate state, In addition to balancing the force in the closing direction due to its own weight and the force in the opening direction due to the intermediate link spring 7, the casing is designed so that the force on the opening side is equal to the force near the open state, and the force on the closing side is greater near the closed state. 1, the pivot point 3 of the upper cover 2, and the pivot pivot point 5 of the arm of the upper cover.
and the relationship between the pair of intermediary link spring shaft fulcrums 6 on the housing 1 side,
Intermediation at a predetermined length takes into consideration the position and weight of the center of gravity of the upper cover relative to the pivot point of the upper cover in the open and closed states (the center of gravity 11i and the magnitude of the moment when viewed from the pivot point). The magnitude of the extension force of the link spring 7 is calculated, and the spring characteristics of the intermediate link spring 7 are determined so as to realize this value.

In addition, in such a configuration, when the cover is opened and the shock absorber hits the stopper, the shock absorber must basically be held on the intermediate link spring 7 side, and the elastic structure inevitably becomes thicker to some extent. ,
The pivot point 6 is on the front side of the casing, and the intermediate link spring 7
Since it swings around the pivot point on the side of the housing, it requires a relatively large side space both in the middle direction and in the front and rear directions, and is also complicated in terms of the horizontal system.

(C1 Purpose and Features In view of the above drawbacks, the present invention provides an improved support structure for opening and closing the top cover of the casing that overcomes these drawbacks. A support structure for the top lid, which includes a body, a top lid supported on a fulcrum so as to be openable and closable by the casing, and a spring mechanism for controlling the moment in the closing direction generated by the weight of the top lid, each fixed to the side of the casing. A hook part that pulls one end of the tension spring and a plate-shaped guide having a long hole that fits the slider and guides the slider are formed, and the above-mentioned "
-1 An arm having an intermediary link pivot is installed on the arm, and one end is pivoted to the pivot of the arm, the other end is the part that pivots the slider, and the other end of the tension spring. The intermediate link has an intermediary link and a slider having a hooking part, one end of the intermediary link with the slider mounted thereon is attached to the shaft support of the arm, and the slider mounted on the other end side is fitted into the elongated hole. In addition, the other end of the tension spring described in 1. The slider can be mounted through the enlarged portion, and a grommet-like rubber is mounted in the enlarged portion to fit in a groove.

fdl embodiment Fig. 3 is a general explanatory diagram including a conventional example, and is a conceptual diagram of the casing and the top cover fixed to the casing, and Fig. 4 is an explanatory diagram of an embodiment of the present invention, showing a side view of the waist. 121. Figures 5, 6, and 7 are supplementary figures to Figure 4 and show the outline of the structure.

In the figure, the casing 1, top cover 2, and hinge 3 are the same as in Figure 1, and the arm 4 is an arm 4' and the pivot support 5 is 5'. It is also mechanically different from the configuration in Figure It'S'1.

That is, what is pivotally supported by the pivot support 5' is the intermediate lever 11, which is simply a lever of a fixed length and has pivots at both ends.
The intermediate lever 11 engages with the shaft support 5' on one support shaft, and on one side fM:! of the other support shaft. A slider 12 (the l+S2 bottom is a concentric cylinder and may be rotated, but it is called a slider), which has a perforated cylindrical shape and a groove on the outer diameter, is mounted, and a tension spring is attached to the other side end. It has a configuration in which a roller 13 for hooking is mounted. On the other hand, a guide plate 15 having a vertical guide groove 14 that engages with the slider 12 and guides the slider is formed on the side of the casing parallel to the side surface. The top of the guide groove 14 has a portion 14a enlarged to the extent that the outer diameter of the slider 2 can pass through, forming a so-called Daruma hole, and during assembly, the slider 12 is guided by passing through this portion 14a. Groove 14
It is configured so that it can be fitted and installed.

A hook portion 17 for a tension spring 16 is formed above the guide plate 15 on the side of the housing 1 . The enlarged portion 14 is also attached to the outer periphery of a perforated rubber cylinder to be attached to the enlarged portion 14a of the guide groove.
A rubber 18 in the form of a so-called grommet is provided, which has a groove bottom constricted to the outside diameter to fit with the groove a, and has a 1:1 groove in which the guide plate is sandwiched in the groove direction.

In this configuration, an intermediary lever 11 is provided with a slider 12 and a roller 13 mounted on the upper lid 2 via an arm 4'.
Mounted on the housing 1 via the hinge 3, open the top cover beyond the normal opening limit, align the slider 12 with the enlarged part of the guide groove, and insert it into the guide groove from the side. On the other hand, one part of the tension spring 16 is connected to the hook part 17,
1. The assembly is completed by attaching the rubber 18 to the part 14a while elastically deforming it with the cover partially closed by hooking the slider 13. It serves as a stopper, and also serves as a stopper for opening the lid and a shock absorber.

The actuator 19 and the microswitch 20 are used to detect the closed state of the top cover, and the actuator 19 is guided by a guide formed in the housing structure and is shifted upward to detect when the cover is closed. In this state, the microswitch 2 comes into contact with the intermediate lever and is pushed down.
0 is activated and U is closed. If the device housed in the housing is one that generates noise, such as a printing device, there is no need to interlock with this signal. Caution: It is to be done.

The first stage design of the cover with this configuration is configured on the auto hinge described above, but the mechanism is slightly different, so the tension spring is 1G.
The moment force around the hinge 3 generated in response to the weight of the top cover 2 corresponding to the stroke and tension of the bar 4'
The transmission is transmitted to the intermediary lever 11 via the shaft fulcrum 5', and is further converted in the direction of the guide groove, so the number of targets increases by one, and therefore, the intersection angle of the links, which is a parameter of conversion, is further increased compared to the conventional one. In addition, it is designed so that the force generated by the weight of the top cover at each position is converted to the guide groove, and the tension at each stroke where the tension spring is generated are adjusted to a predetermined relationship. They are similar in that they do so.

But these? In a configuration with an iS lever and a guide groove, the spring II! One extra design parameter can be added to adjust the force on the side opposing the I' property.Furthermore, when the guide I' groove is pulled out with a shape press, the guide groove is not necessarily straight but in a predetermined section. It can also be bent, adding one more freely selectable design parameter to adjust the force opposing the spring properties.
It is possible to finely match the opposing force having non-fan-shaped characteristics in the intermediate opening state with the force of the spring having fan-shaped characteristics over a wider opening/closing angle range.

In addition, in this configuration, the guide plate is fixed to the casing, and only a small intermediate link moves, and due to the above design parameters, white discoloration increases. Since the position of the can be moved to some extent within the housing, it is also possible to remove the side of the device mounted inside the housing and set it, for example, in the innermost corner of the housing with the device removed, and the guide plate can also be moved, for example. By folding back the plate that forms the rear surface of the casing? ! It is now possible to use a part of the i-strong structure to form the structure, and since these corner areas were areas that could not be used as functional structure mounting space in the past, the casing also has the advantage of being able to utilize unused space. Contributes to downsizing.

(el effect As explained above, according to the present invention, the guide is fixed-side equipment and the spring is also fixed-side equipment, so it is possible to realize an extremely simple support 1.+1 structure, and there are relatively few restrictions on the setting position. It has a unique effect in that it can realize a support structure with a small number of structural parts and does not take up much space at an extremely low cost.

[Brief explanation of the drawing]

Figures 1 and 2 are explanatory diagrams of a conventional auto-hinge cover, explaining its typical configuration and characteristics, and Figure 3 is a general explanatory diagram common to the conventional example, showing the relationship between the casing, top cover, and hinge. The explanatory diagrams, FIGS. 4 to 7, are explanatory diagrams of one embodiment of the present invention,
FIG. 4 is a side 11i side view illustrating the support structure, and FIGS. 5, 6, and 7 are perspective views of the structure shown in FIG. 4, respectively. In the figure, l is the housing, 2 is the top lid, 3 is the hinge, 4 and 4' are the arms, 11 is the mediating lever, 12 is the slider, 14 is the guide groove, 15 is the guide plate, and 16 is the tension lever. φ [− 1st +'l.

Claims (1)

[Scope of Claims] (11) A top cover support structure having a casing, a top lid supported on a fulcrum in an openable and closable manner by the casing, and a spring mechanism that controls the IW (one-way moment) generated by the top lid's own weight. , a hook portion for hooking one end of a tension spring, which is a fixed structure, and a plate-shaped guide having an elongated hole for fitting a slider and guiding the slider are formed on the sides of the casing, and the upper lid In addition to installing an arm to ff the intermediate link shaft branch,
It has an intermediary link having a portion pivotally supported by the shaft support of the arm at one end, a portion pivotally supporting the slider and a portion hooking the other end of the tension spring at the other end, yi+
One end of the intermediary link with the slider mounted thereon is attached to the shaft support of the arm, the slider mounted on the other end side is fitted into the elongated hole, and the other end of the tension spring is hooked. A support structure for opening and closing the top cover of the housing. (2) The upper hole formed in the guide is a daruma hole having a strong enlarged part of the elongated hole, and the slider ρ can be mounted through the enlarged part, and the enlarged part A support structure for opening and closing a case top cover as claimed in claim (1), characterized in that a grommet-like rubber is mounted in a grooved portion of the support structure.