The press-fit device includes a platform having an upper surface provided with a bearing base; a mounting rack disposed at the upper surface of the platform; a power cylinder mounted at the mounting rack, including a piston chamber, a piston rod and an actuating element intercommunicated with the piston chamber to provide pressure medium, wherein the piston rod is perpendicular to the bearing base; a guiding track disposed at the upper surface of the platform and arranged in parallel to the piston rod; and a press-fit plate disposed at one end of the cylinder rod and slidably sheathed on the guiding track, wherein a surface of the press-fit plate facing the bearing base is provided with a pressure base, and a surface of the pressure base facing the bearing base is provided with a press-fit frame and a pressure sensing device which is configured to detect a press-fit pressure.

This application claims priority to and the benefit of Chinese Patent Application No. 201510205274.9 filed on Apr. 24, 2015, which application is incorporated herein in its entirety.

TECHNICAL FILED

Embodiments of the present invention relate to a press-fit device.

BACKGROUND

During assembling a backlight module with a panel, it requires to perform a press-fit process. In existing press-fit devices, the panel and the backlight module are supported by separate mechanisms, respectively, and then aligned and bonded with each other. Such kind of press-fit devices neither can ensure that a final state of products upon aligning and press-fit satisfies industrial demands nor can monitor important control parameters in real time, which results in poor product yield.

SUMMARY

At least one embodiment of the present invention provides a press-fit device which can monitor important control parameters in real time while ensuring a backlight module and a panel to be completely bonded with each other.

Embodiments of the present invention provide technical solutions as below.

A press-fit device, comprising: a platform having an upper surface provided with a bearing base; a mounting rack disposed at the upper surface of the platform; a power cylinder disposed at the mounting rack above the bearing base, the power cylinder comprises a piston chamber, a piston rod, and an actuating element intercommunicated with the piston chamber to supply the piston chamber with pressure medium and control a pressure in the piston chamber, wherein the piston rod is perpendicular to the bearing base; a guiding track disposed on the upper surface of the platform and arranged in parallel to the piston rod; and a press-fit plate disposed at one end of the piston rod and slidably sheathed on the guiding track, wherein a surface of the press-fit plate facing the bearing base is provided with a pressure base corresponding to the bearing base, and a surface of the pressure base facing the bearing base is provided with a press-fit frame and a pressure sensing device, the pressure sensing device is configured to measure a press-fit pressure.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

In order to make objects, technical details and advantages of the embodiments of the invention apparent, technical solutions according to the embodiments of the present invention will be described clearly and completely as below in conjunction with the accompanying drawings of embodiments of the present invention. It is to be understood that the described embodiments are only a part of but not all of exemplary embodiments of the present invention. Based on the described embodiments of the present invention, various other embodiments can be obtained by those of ordinary skill in the art without creative labor and those embodiments shall fall into the protection scope of the present invention.

Unless otherwise defined, all the technical and scientific terms used herein have the same meanings as commonly understood by one of ordinary skill in the art to which the present invention belongs. The terms, such as “first,” “second,” or the like, which are used in the description and the claims of the present application, are not intended to indicate any sequence, amount or importance, but for distinguishing various components. Also, the terms, such as “comprise/comprising,” “include/including,” or the like are intended to specify that the elements or the objects stated before these terms encompass the elements or the objects and equivalents thereof listed after these terms, but not preclude other elements or objects. The terms, “on,” “under,” or the like are only used to indicate relative position relationship, and when the position of the object which is described is changed, the relative position relationship may be changed accordingly.

First Embodiment

Referring toFIGS. 1-3, a press-fit device as provided by an embodiment of the present invention includes a platform1, a mounting rack2, a power cylinder3, a guiding track4and a press-fit plate5. An upper surface of the platform1is provided with a bearing base11. The mounting rack2is disposed at the upper surface of the platform1. The power cylinder3includes: a cylinder block31provided with a piston chamber32; a piston33slidably disposed in the piston chamber32; a piston rod34having a rear end connected to the piston33; and an actuating element35(not illustrated inFIGS. 1-2but inFIG. 3) intercommunicated with the piston chamber32to supply the piston chamber32with pressure medium and control a pressure in the piston chamber32; wherein, the cylinder block31is disposed at the mounting rack2, and the piston rod34is perpendicular to the bearing base11; the piston chamber32is divided into two compartments by the piston33, and the actuating element35are intercommunicated with the two compartments, respectively, to supply both of the two compartments with pressure medium so as to control a pressure in the piston chamber32and hence to control a pressure applied to the outside by the piston rod34. The guiding track4is disposed on the upper surface of the platform1and is arranged in parallel to the piston rod34. The press-fit plate5is disposed at a front end of the piston rod34and is slidably sheathed on the guiding track4so as to move along the guiding track4driven by the power cylinder3. A bottom surface of the press-fit plate5is provided with a pressure base6corresponding to the bearing base11, and a bottom surface of the pressure base6is provided with a pressure frame61and a pressure sensing device which is configured to measure a press-fit pressure. An air cylinder or an oil cylinder can be utilized as the power cylinder3, wherein the air cylinder especially can ensure a safety of production environment because it has no way of resulting in oil leakage which pollutes the environment.

In an example of the present embodiment, as illustrated inFIG. 3, the actuating element35includes an air pump (not illustrated) and an electromagnetic valve (not illustrated), and can supply the piston chamber32with pressure gas through the electromagnetic valve and a switch of the air pump, so as to control a pressure output by the piston rod34. The air pump and the electromagnetic valve in this example are well-known devices for those skilled in the art, and the structure or working principle thereof will be omitted herein.

In an example of the present embodiment, the pressure base6is detachably mounted at the press-fit plate5, which allows a replacement of pressure base with different sizes according to a size of the panel to be press-fitted.

In an example of the present embodiment, the pressure sensing device can be connected to a display which is configured to display a pressure value as measured by the pressure sensing device. During operation, one can view the pressure value as measured by the pressure sensing device through the display so as to control a pressure of the pressure medium in the piston chamber of the cylinder block according to the pressure value; in this way, it can realize a real-time monitor of the press-fit pressure so as to ensure a complete press-fit between the panel and the backlight module.

During the operation of the press-fit device as provided by the embodiment of the present invention, the backlight module and the panel are successively placed onto the bearing base11; upon starting the power cylinder3, the piston rod34pushes the press-fit plate5to move towards the platform1, which allows the pressure base6to move towards the bearing base11so as to press-fit the panel with the backlight module. During the press-fit process, the pressure sensing device measures the press-fit pressure in real time, which allows adjusting the actuating element based on the real-time press-fit pressure so as to regulate the press-fit pressure; in this way, the backlight module and the panel can be completely bonded with each other and the product yield can be improved.

In an example of the present embodiment, two guiding tracks4can be disposed at two sides of the piston rod34, respectively. In such case, the press-fit device can further include a stabilizing plate7which is disposed on the two guiding tracks4and is connected to the cylinder block31. With the use of the stabilizing plate7, the guiding track4can be connected to the cylinder block31, so as to reduce a shaking of the piston rod during stretching out and drawing back, which improves a movement stability of the press-fit plate and ensures a complete press-fit.

In an example of the present embodiment, a gantry can be utilized as the mounting rack2. In such case, the cylinder block31can be disposed at a bottom surface of a beam in the gantry.

In an example of the present embodiment, as illustrated inFIG. 2, the pressure sensing device includes a plurality of pressure sensors611uniformly arranged along the press-fit frame61. For example, the press-fit frame61can be formed of soft plastic or rubber, so as to facilitate mounting the pressure sensors611at the press-fit frame61, for example, embedding the pressure sensors611into the press-fit frame61. The pressure values as measured by the pressure sensors611disposed at various locations can reflect a flatness condition of the product in real time during the press-fit process. It should be explained that,FIG. 2merely illustrates4pressure sensors611uniformly arranged along a single side edge of the press-fit frame61for simplicity. Those skilled in the art will be appreciated that, in other embodiments, the pressure sensors611can be arranged on more than one side edge of the press-fit frame61, including or excluding the side edge illustrated inFIG. 2, and can be arranged on each side edge at an amount larger or smaller than that illustrated inFIG. 2, according to demands of industrial production without limiting the present invention thereto.

In an example of the present embodiment, as illustrated inFIG. 4, the pressure sensing device can further include a plurality of pressure sensitive balls62which are uniformly arranged in an array on a lower surface of the pressure base6.FIG. 4illustrates9pressure sensitive balls62which are arranged in a matrix on the lower surface of the pressure base6. However, embodiments of the present invention are not limited thereto. By utilizing pressure sensitive balls62and by presenting a press-in status of respective pressure sensitive balls62through the display, it can reflect a flatness condition of the product in real time during the press-fit process.

In an example of the present embodiment, as illustrated inFIG. 5, the pressure base6is provided with a plurality of vac-sorb holes63which can be connected to an external sorption pump. In this way, during the press-fit process, the pressure base6can absorb the panel through the vac-sorb holes63, so as to prevent the panel from moving and hence to ensure a complete press-fit.

Second Embodiment

The press-fit device as provided by the present embodiment has structure and configuration almost the same with that of the first embodiment except that the press-fit device in the present embodiment further includes a controller8, as illustrated inFIG. 6. The controller8has an input end communicatively connected to the pressure sensing device (e.g., the pressure sensor611) and an output end connected to the actuating element35so as to control the pressure in the piston chamber.

In an example of the present embodiment, the controller can be stored with a pre-determined, standard press-fit pressure value. Upon inputting the real-time pressure value as measured by the pressure sensing device into the controller, the controller compares the real-time pressure value with the pre-determined standard press-fit pressure value as stored; if the real-time pressure value is greater than the standard pressure value, the controller controls the actuating element to operate to reduce the pressure in the piston chamber; and if the real-time pressure value is smaller than the standard pressure value, the controller controls the actuating element to operate to raise the pressure in the piston chamber so as to increase the press-fit pressure; in this way, it can ensure that the press-fit pressure satisfies demands of design, so as to ensure a complete press-fit between the backlight module and the panel and to improve the product yield.

It should be explained that, in the present embodiment, the pressure sensing device may not be connected to a display.

Third Embodiment

The press-fit device as provided by the present embodiment has structure and configuration almost the same with that of the first embodiment except that the press-fit device in the present embodiment is provided with a plurality of bearing bases11and a plurality of pressure bases6which are arranged in one-to-one correspondence, as illustrated inFIG. 7.FIG. 7illustrates two bearing bases11and correspondingly two pressure bases6, wherein the two pressure bases6are arranged in symmetry about an axis of the piston rod34; however, embodiments of the present invention are not limited thereto. In various examples of the present embodiment, both of the pressure base and the bearing base can be provided at an amount of 2N, wherein N is 0, 1, 2, . . .

It is understood that the described above are just exemplary implementations and embodiments to explain the principle of the present invention and the invention is not intended to be limited thereto. An ordinary person in the art can make various variations and modifications to the present invention without departure from the spirit and the scope of the present invention, and such variations and modifications shall fall in the scope of the present invention.

The present application claims the priority of China patent application No. 201510205274.9 filed on Apr. 24, 2015 titled “PRESS-FIT DEVICE”, which is incorporated herein by reference in its entirely.