CN216526760U - Waterproof gauge head structure - Google Patents

Abstract

The utility model relates to the technical field of watches, and particularly discloses a waterproof watch head structure which comprises a middle shell, a front shell, a bottom shell and a PCBA (printed Circuit Board Assembly) board, wherein the front shell and the bottom shell are arranged on two sides of the middle shell and are respectively connected with the middle shell in a sealing manner, the PCBA board is fixed on the inner surface of the middle shell, two opposite side surfaces of the middle shell are respectively provided with glue overflow grooves, annular glue layers are arranged in the glue overflow grooves, the front shell is embedded into the glue overflow groove on one side of the middle shell and is bonded with the annular glue layers, and the bottom shell is embedded into the glue overflow groove on the other side of the middle shell and is bonded with the annular glue layers; a hard cementing layer is arranged on one side of the bottom shell, which is back to the middle shell; the surface of PCBA board is provided with the water barrier. Above-mentioned waterproof gauge outfit structure sets up the excessive gluey groove respectively in the both sides of mesochite to set up annular glue film in the excessive gluey inslot, set up the stereoplasm cementing layer and set up the water barrier on PCBA board at the back of drain pan, through multiple protection, realized the comprehensive protection to the gauge outfit structure, promoted the waterproof performance of gauge outfit structure, reduced wrist-watch fault rate, be favorable to prolonging the life of wrist-watch.

Description

Waterproof gauge head structure

Technical Field

The utility model relates to the technical field of watches, in particular to a waterproof watch head structure.

Background

The watch head mainly comprises a shell formed by a front shell, a middle shell and a bottom shell, and a dial plate and a circuit control panel accommodated in the inner cavity of the shell. When the watch is used, if the watch contacts water or sweat, the water or sweat enters the shell through the joint part of the front shell and the middle shell, the joint part of the middle shell and the bottom shell and the gap matched with the keys, and after the circuit control board contacts the water or sweat, a short circuit or other faults occur in a circuit of the circuit control board, so that partial functions of the watch fail or the faults, and the normal use of the watch is influenced. In addition, the circuit control board is in contact with water or sweat for a long time to be damaged at an accelerated speed, so that the service life of the watch is shortened.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a waterproof watch head structure aiming at the technical problems that the waterproof effect of the watch head is insufficient and the service life of the watch is affected.

A waterproof watch head structure comprises a middle shell, a front shell, a bottom shell and a PCBA plate, wherein the front shell is arranged on one side of the middle shell and is in sealed connection with the middle shell, the bottom shell is arranged on the other side of the middle shell and is in sealed connection with the middle shell, the PCBA plate is fixed on the inner surface of the middle shell, two opposite side surfaces of the middle shell are respectively provided with a glue overflow groove, an annular glue layer is arranged in the glue overflow grooves, the front shell is embedded into the glue overflow groove on one side of the middle shell and is bonded with the annular glue layer, and the bottom shell is embedded into the glue overflow groove on the other side of the middle shell and is bonded with the annular glue layer; a hard cementing layer is arranged on one side of the bottom shell, which is back to the middle shell; and a water-resisting layer is arranged on the surface of the PCBA board.

In one embodiment, the water barrier layer is a fluorine nano-coating.

In one embodiment, the bottom shell is formed with the hard glue layer by an in-mold insert molding process.

In one embodiment, the central part of the bottom shell is convex towards the direction far away from the middle shell, and an abutting position contacting with the surface of the skin of the human body is formed.

In one embodiment, the surface of the abutting position, which is matched with the skin of the human body, is a plane, and the hard cementing layer is arranged on the plane.

In one embodiment, a plurality of bumps are arranged on the middle shell at intervals in the glue overflow groove matched with the bottom shell, a plurality of grooves corresponding to the bumps one by one are formed in the bottom shell, and the annular glue layer deforms under the extrusion of the bumps and is pressed into the corresponding grooves.

In one embodiment, the waterproof meter head structure further comprises a movable key and a switch, the switch is accommodated in the middle shell and electrically connected with the PCBA, the side face of the ring of the middle shell is provided with a jack, and the movable key penetrates through the jack and is matched with the switch.

In one embodiment, the movable key is sleeved with a rubber ring, and the rubber ring is abutted to the inner wall of the jack.

In one embodiment, a high-viscosity sealing coating is arranged between the rubber ring and the jack.

In one embodiment, the high viscosity seal coating is a fluorosilicone grease layer.

According to the waterproof meter head structure, the glue overflowing grooves are formed in the two sides of the middle shell respectively, the annular glue layers are arranged in the glue overflowing grooves, and gaps between the middle shell and the front shell and gaps between the middle shell and the bottom shell can be plugged; the hard cementing layer is arranged on the back of the bottom shell, so that sweat can be prevented from entering the middle shell through a gap formed in the bottom shell due to processing; set up the water barrier on the PCBA board, even damage at the gauge outfit shell, water or sweat get into the shell inner chamber, the water barrier still can protect the PCBA board, through setting up multiple protection to the gauge outfit structure, has realized the comprehensive protection to the gauge outfit structure, has promoted the waterproof performance of gauge outfit structure, has reduced wrist-watch fault rate, is favorable to prolonging the life of wrist-watch.

Drawings

FIG. 1 is a schematic structural view of a waterproof watch head structure according to an embodiment of the present invention;

FIG. 2 is a schematic view of an exploded view of a waterproof watch head structure according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a waterproof watch head structure according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a middle shell in one embodiment of the present invention;

FIG. 5 is a schematic view of a bottom case according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a bottom case from another perspective in an embodiment of the utility model.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Aiming at the problems that the traditional intelligent watch is insufficient in waterproofness, and water or sweat easily enters the inside of the watch head through a gap at the joint of the watch head shell, so that electronic elements in the watch head are soaked and damaged, the watch head is additionally provided with a multiple waterproof structure, and a flow channel of the water or sweat is blocked step by step, so that the influence of the water or sweat on the electronic elements of the watch is weakened or even eliminated, and the waterproof effect of the watch is improved. Specifically, referring to fig. 1 to 3, the waterproof watch head structure 10 of the present embodiment includes a middle case 100, a front case 200 disposed on one side of the middle case 100 and hermetically connected to the middle case 100, a bottom case 300 disposed on the other side of the middle case 100 and hermetically connected to the middle case 100, and a PCBA board 400 fixed to an inner surface of the middle case 100, wherein two opposite sides of the middle case 100 are respectively provided with a glue overflow groove 110, an annular glue layer 120 is disposed in the glue overflow groove 110, the front case 200 is embedded in the glue overflow groove 110 on one side of the middle case 100 and bonded to the annular glue layer 120, and the bottom case 300 is embedded in the glue overflow groove 110 on the other side of the middle case 100 and bonded to the annular glue layer 120; a hard glue layer 310 is arranged on one side of the bottom shell 300, which is back to the middle shell 100; the surface of the PCBA board 400 is provided with a water barrier layer 410. That is to say, in the watch head structure of the present embodiment, the annular glue layer 120 for blocking the passage of water or sweat is disposed at the connection portion between the middle case 100 and the front case 200 and the connection portion between the middle case 100 and the bottom case 300 as a first re-protection, the hard glue layer 310 is disposed on the bottom case 300 as a second re-protection for blocking the passage of water or sweat, and the water-blocking layer 410 is disposed on the PCBA board 400 as a third re-protection, which protects the PCBA board 400 together to prevent the water or sweat from contacting the printed circuit structure on the PCBA board 400, which may cause a short circuit or corrosion damage of the circuit elements, thereby prolonging the service life of the watch.

The middle case 100 is used for receiving and fixing the PCBA board 400, in this embodiment, the inner wall surface of the middle case 100 is provided with an annular protrusion 130, the height of the annular protrusion 130 is smaller than the height of the middle case 100, so that an adhesive overflow groove 110 is formed between two sides of the annular protrusion 130 and two sides of the middle case 100, in other words, a stepped adhesive overflow groove 110 is formed between one side of the annular protrusion 130 and one side of the middle case 100, a stepped adhesive overflow groove 110 is formed between the other side of the annular protrusion 130 and the other side of the middle case 100, and the adhesive overflow groove 110 is used for receiving and limiting the position of the front case 200 or the bottom case 300 on one hand, and is also used for arranging the annular adhesive layer 120 on the other hand. In this embodiment, the annular adhesive layer 120 is formed by coating a sealant in the glue overflow groove 110, during the process of assembling the meter, the PCBA board 400 is first fixed in the middle shell 100, then glue is coated in the glue overflow grooves 110 on both sides of the middle shell 100, the front shell 200 and the bottom shell 300 are respectively embedded in the corresponding glue overflow grooves 110, the front shell 200 is bonded with the middle shell 100 through the glue, the bottom shell 300 is bonded with the middle shell 100 through the glue, and the sealing of the meter connection seam is realized. The sealant can be hot melt adhesive with high adhesive force and good waterproof and sweat-proof performance, can also be resin adhesive with higher viscosity and paste shape, and can also be other adhesive liquid with lower fluidity. In another embodiment, the ring glue layer 120 may also be 3M glue, and the ring glue layer 120 is composed of a base layer of foam material and glue coated on the base layer.

Referring to fig. 4 and 5, in an embodiment, a plurality of bumps 140 are spaced in the glue overflow groove 110 of the middle shell 100, which is matched with the bottom shell 300, a plurality of grooves 320 (only a part of the grooves is shown in fig. 5) corresponding to the bumps 140 are formed in the bottom shell 300, and the annular glue layer 120 deforms and is pressed into the corresponding grooves 320 under the extrusion of the bumps 140. In this embodiment, the annular adhesive layer 120 is obtained by cutting a 3M adhesive sheet including a base layer and an adhesive solution, after the annular adhesive layer 120 is attached to the overflow groove 110 of the middle shell 100, after the bottom shell 300 is embedded into the overflow groove 110 on one side of the middle shell 100, the bump 140 on the bottom shell 300 extrudes the annular adhesive layer 120, so that the annular adhesive layer 120 deforms, and the deformed portion on the annular adhesive layer 120 is pushed by the bump 140 to be pressed into the groove 320, so that on one hand, the middle shell 100 is connected with the bottom shell 300 in a buckling manner, on the other hand, the contact area between the annular adhesive layer 120 and the middle shell 100 and the bottom shell 300 is increased, and the gap of the buckling connection portion is completely blocked, so as to realize the sealing connection between the middle shell 100 and the bottom shell 300.

In one embodiment, the bottom chassis 300 is formed with the hard glue layer 310 by an in-mold insert molding process. In-Mold insert Injection Molding (IML) is a process In which a printed film is molded, then inserted into an injection Mold cavity, and then Mold closing and injection molding are performed, wherein injection molding resin is combined with an ink layer on the back of the film, so that a transparent hardened film is formed on the surface of the ink layer. In this embodiment, bottom shell 300 is embedded in the injection mold cavity, and the injection molding resin is subjected to matched die injection molding on the surface of bottom shell 300, thereby forming a layer of hard glue layer 310 on the surface of bottom shell 300, this hard glue layer 310 is a transparent film, through setting up hard glue layer 310, on the one hand, the appearance of bottom shell 300 is guaranteed, and patterns or logo are convenient to print on bottom shell 300, on the other hand, hard glue layer 310 further seals the pores on the surface of bottom shell 300 due to processing, and water or sweat is prevented from entering middle shell 100 through the surface of bottom shell 300, so as to realize the waterproof protection of PCBA board 400.

Further, referring to fig. 2 and 6, the central portion of bottom case 300 protrudes away from middle case 100 to form an abutting portion 330 (the hard glue layer is removed in fig. 6) contacting with the skin surface of the human body. Preferably, the surface of the abutting portion 330 that is matched with the skin of the human body is a plane, and the hard glue layer 310 is disposed on the plane. A heart rate sensor 340 electrically connected with the PCBA board 400 is arranged on one side of the bottom case 300 facing the middle case 100 at a position corresponding to the abutting position 330, the heart rate sensor 340 is used for collecting pulse signals of a human body, namely, collecting physiological parameters of the human body and sending the parameters to the PCBA board 400, the front case 200 is provided with a touch display screen 210 electrically connected with the PCBA board 400, and the touch display screen 210 receives the signals sent by the PCBA board 400 and displays parameters such as time and human heart rate data. In this embodiment, set up the arch at the central part of drain pan 300, when avoiding that the whole attached human skin surface in drain pan 300 surface, because of the interference signal that human action produced, make the signal that heart rate sensor 340 gathered can accurately reflect human actual physiological parameter, furthermore, through setting up the arch, the area of contact on drain pan 300 and human skin surface has been reduced, avoid wearing the wrist-watch for a long time, even the heat is difficult to discharge between drain pan 300 and the skin surface, and then drain pan 300 department sweat that causes gathers the problem, reach the purpose that reduces the sweat volume, improve waterproof problem from the sweat source.

In one embodiment, the water barrier layer 410 is a fluorine nano-coating. The fluorine nano-coating covers the PCBA board 400, forming a comprehensive protection for the surface of the PCBA board 400, preventing water or sweat from entering the middle case 100 when the gauge outfit structure fails. The fluorine nano coating has stronger hydrophobic and oleophobic performance (see the Chinese invention patent with the application number of CN 202110700011.0), and can prevent water, sweat and grease in the sweat from contacting the PCBA board 400, thereby achieving the protection of the PCBA board 400. In this embodiment, the portion of the connector on the PCBA board 400 is provided with an insulating coating or an adhesive tape to block the contact between the waterproof layer 410 and the connection portion of the connector, thereby ensuring the conductivity of the connector.

Further, please refer to fig. 1 and fig. 2, the waterproof watch head structure 10 further includes a movable button 500 and a switch, the switch is accommodated in the middle casing 100 and electrically connected to the PCBA board 400, the ring side surface of the middle casing 100 is provided with an insertion hole 150, and the movable button 500 penetrates through the insertion hole 150 and is matched with the switch. In this embodiment, the movable key 500 is sleeved with a rubber ring, and the rubber ring abuts against the inner wall of the insertion hole 150. Further, a high viscosity sealing coating is provided between the rubber ring and the socket 150. Preferably, the high viscosity seal coating is a fluorosilicone grease layer. Through setting up rubber ring and fluorine silicon grease layer, realized the dual protection to activity button 500 position, the rubber ring is when guaranteeing that activity button 500 is sealed, still can cushion the impact to mesochite 100 when activity button 500 presses, avoids mesochite 100 to be damaged, and fluorine silicon grease layer is used for filling the gap between rubber ring and the jack 150, further promotes the leakproofness at activity button 500 position.

According to the waterproof meter head structure 10, the glue overflow grooves 110 are respectively formed in the two sides of the middle shell 100, the annular glue layer 120 is arranged in the glue overflow grooves 110, and a gap between the middle shell 100 and the front shell 200 and a gap between the middle shell 100 and the bottom shell 300 can be sealed; the hard gluing layer 310 is arranged on the back of the bottom shell 300, so that sweat can be prevented from entering the middle shell 100 through a gap generated by processing on the bottom shell 300; set up water barrier 410 on PCBA board 400, even damage at the gauge outfit shell, water or sweat get into the shell inner chamber, water barrier 410 still can protect PCBA board 400, through setting up multiple protection to the gauge outfit structure, has realized the comprehensive protection to the gauge outfit structure, has promoted the waterproof performance of gauge outfit structure, has reduced wrist-watch fault rate, is favorable to prolonging the life of wrist-watch.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A waterproof watch head structure comprises a middle shell, a front shell arranged on one side of the middle shell and connected with the middle shell in a sealing way, a bottom shell arranged on the other side of the middle shell and connected with the middle shell in a sealing way, and a PCBA plate fixed on the inner surface of the middle shell,

two opposite side surfaces of the middle shell are respectively provided with a glue overflow groove, an annular glue layer is arranged in the glue overflow groove, the front shell is embedded into the glue overflow groove on one side of the middle shell and is bonded with the annular glue layer, and the bottom shell is embedded into the glue overflow groove on the other side of the middle shell and is bonded with the annular glue layer; a hard cementing layer is arranged on one side of the bottom shell, which is back to the middle shell; and a water-resisting layer is arranged on the surface of the PCBA board.

2. The waterproof watch head structure of claim 1, wherein said water barrier is a fluorine nanocoating.

3. The waterproof watch head structure of claim 2, wherein said hard glue layer is formed on said bottom case by an in-mold insert molding process.

4. The waterproof watch head structure of claim 3, wherein a central portion of said bottom case is protruded away from said middle case to form an abutment position contacting a skin surface of a human body.

5. The waterproof watch head structure of claim 4, wherein the mating surface of the abutting position with the skin of the human body is a plane, and the hard cementing layer is arranged on the plane.

6. The waterproof watch head structure according to claim 5, wherein a plurality of protrusions are arranged on the middle case at intervals in the glue overflow groove matched with the bottom case, a plurality of grooves corresponding to the protrusions one to one are arranged on the bottom case, and the annular glue layer deforms under the extrusion of the protrusions and is pressed into the corresponding grooves.

7. A waterproof meter head structure according to claim 6, further comprising a movable key and a switch, wherein the switch is accommodated in the middle casing and electrically connected with the PCBA, the side face of the middle casing is provided with an insertion hole, and the movable key penetrates through the insertion hole and is matched with the switch.

8. The waterproof watch head structure of claim 7, wherein the movable key is sleeved with a rubber ring, and the rubber ring is abutted against the inner wall of the jack.

9. The waterproof watch head structure of claim 8, wherein a high viscosity sealing coating is provided between said rubber ring and said socket.

10. The waterproof watch head structure of claim 9, wherein said high viscosity seal coating is a layer of fluorosilicone grease.

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