Detachable metal watch band antenna

Abstract

The utility model discloses a detachable metal watch band antenna, which comprises watch grains and watchbands arranged at two end parts of the watch grains, the watch grains and the watchbands are integrally or detachably connected, a signal switching device insulated from a metal watchcase is arranged in the watch grains, a metal watch shaft connected with the signal switching device in the watch grains is arranged in the watchbands, and the metal watch shaft is connected with the signal switching device in the watch grains. A stainless steel antenna connected with the metal watch shaft is arranged in the watchband; and the stainless steel antenna comprises a winding section wound on the metal watch shaft and a radiation section arranged along the length direction of the watchband. Compared with the prior art, the detachable watchband antenna of the metal watch has the advantages that the watchband antenna is used for the metal watch, the problem that the space in the watch body is limited is solved, the antenna clearance and the radiation clearance are increased, and the signal radiation performance of the watch is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of watches, in particular to a detachable metal watch strap antenna. Background Art

[0002] With the development of science and technology and the improvement of people's requirements for the use of watch products, watches tend to develop towards intelligentization.

[0003] Currently, communication watches are divided into Bluetooth, NB, GPS, 4G and other versions. Among them, Bluetooth watch antennas are relatively easy to design and have no performance restrictions. In addition, the antennas of other versions of watches are difficult to design due to the small size and compact structure of the watches themselves. The performance is generally average or deviated and cannot achieve the ideal effect. Metal watches are the most difficult to debug and have the worst performance. This is currently the most difficult problem to overcome in watch antenna debugging.

[0004] Conventional antennas are usually designed on the case using FPC or LDS technology, which has the following problems:

[0005] ①The motherboard is too small and the ground length cannot meet 1 / 4 of the antenna wavelength;

[0006] ② The size of watches is relatively compact, the antenna height is generally only about 3MM, and the effective area is about 300 square millimeters, which are all relatively small. Metal watches have a good advantage in appearance and texture, and their antennas directly use the metal shell as the antenna radiator.

[0007] The housing acts as an antenna:

[0008] ① The antenna is only about 2MM away from the motherboard, battery, etc.

[0009] ②The shape of the metal itself is fixed and cannot be adjusted;

[0010] ③ Multiple antennas are connected to metal at the same time, which causes each antenna to compromise performance.

[0011] The specific debugging method is to find suitable signal access points, grounding points, and multi-channel tuning switch frequency selection and other comprehensive technologies to achieve the best utilization effect. Even so, the signal effect debugged in this way still cannot meet the signal standard requirements. Utility Model Content

[0012] The technical problem to be solved by the utility model is to overcome the above technical defects and provide a detachable metal watch strap antenna for use with metal watches, which gets rid of the problem of tight space inside the watch body, increases the antenna clearance and radiation clearance, and enhances the signal radiation performance of the watch.

[0013] In order to solve the above technical problems, the technical solution provided by the utility model is a detachable metal watch strap antenna, including a watch grain and straps arranged at both ends of the watch grain, the watch grain and the strap are integrally or detachably connected, a metal watch shaft is provided in the strap, and a metal connecting piece for radiation conversion with the metal watch shaft is provided in the watch grain, a stainless steel antenna is provided in the strap and connected to the metal watch shaft, the stainless steel antenna includes a winding section wound around the metal watch shaft and a radiating section arranged along the length direction of the strap.

[0014] Preferably, the watch strap is detachably connected to the watch particle, and a right striker and a left striker are respectively provided at the ends of the watch strap, the right striker is electrically connected to the control circuit board, and the left striker is connected to a toggle rod, and a toggle groove is concave in the toggle rod to match the end of the watch strap, and retaining grooves are provided in the ears at both ends of the watch particle to accommodate the left and right strikers of the watch strap.

[0015] Preferably, the watch strap and the watch particle are integrally formed and cannot be detached, the metal watch shaft includes a right striker and a left striker, and the right striker of the metal watch shaft in the watch strap is electrically connected to the control circuit board in the watch particle through a metal connector.

[0016] Preferably, a radio frequency coaxial line is connected between the metal connector and the control circuit board in the watch particle, and the metal connector is insulated from the metal shell of the watch particle.

[0017] Preferably, the horizontal grounding end of the RF coaxial line is connected to the metal shell of the watch, the stainless steel antenna is a stainless steel antenna with a diameter of 0.2-0.8MM, the winding section of the stainless steel antenna is coiled and sleeved with the metal watch shaft, the radiation section of the stainless steel antenna is one of a serpentine, straight, arc, and L-shaped shape and is arranged along the length direction of the watch strap, and the inner line length of the stainless steel antenna is greater than 8cm.

[0018] Preferably, the stainless steel antenna is a GPS wire, the winding section of the stainless steel antenna is coiled and sleeved with the metal watch shaft, and the radiation section of the stainless steel antenna is 4-6 cm long in the watch strap.

[0019] Preferably, when the watch strap is detachably connected, the strokes of the right striker and the left striker are both 1.3 mm, and the right striker is compressed to 1 mm when the right striker contacts the metal connector.

[0020] Preferably, the stainless steel antenna and the metal watch shaft are fixed in the watch strap by silicone in-mold injection molding.

[0021] The invention discloses an application of a detachable metal watch strap antenna. When the watch is provided with a non-metallic shell, the stainless steel antenna can also be used as a ground wire, and the radio frequency coaxial line is also a ground wire. The winding section of the stainless steel antenna is coiled and sleeved with the metal watch shaft.

[0022] The advantages of the utility model compared with the prior art are:

[0023] In the present application, the stainless steel antenna inside the watch strap can be used as an antenna, so that the antenna performance is better than the conventional design. At the same time, the appearance of the watch can be freely designed without considering the antenna performance, so that there is no need to reserve antenna clearance space in its internal space. The watch size can be made thinner or the battery capacity can be made larger at the same size, reducing a series of device costs caused by multi-way switch design, reducing potential risks and space concessions to the motherboard layout when compatible with this design, getting rid of the problem of space tightness inside the watch body, increasing the antenna clearance and radiation clearance, enhancing the signal radiation performance of the watch, thereby reducing the design difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The present invention is a structural schematic diagram of a detachable metal watch strap antenna.

[0025] Figure 2 It is a partial structural schematic diagram of a cross-section of the watch strap.

[0026] Figure 3 It is a diagram of passive gain and efficiency data.

[0027] Figure 4 This is a return loss diagram.

[0028] Figure 5 It is a schematic diagram of standing wave ratio.

[0029] Figure 6 It is the Smith chart.

[0030] As shown in the figure: 1. Watch grain, 2. Watch strap, 3. Metal watch shaft, 4. Stainless steel antenna, 5. Winding section, 6. Radiating section, 7. Right firing pin, 8. Left firing pin, 9. Toggle lever, 10. Stop groove, 11. Metal connector, 12. Wire, 13. Metal shell. DETAILED DESCRIPTION

[0031] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0032] Combined with Figure 1-6 As shown, a detachable metal watch strap antenna includes a watch particle 1 and straps 2 arranged at both ends of the watch particle 1, the watch particle 1 and the strap 2 are integrally or detachably connected, a metal connector 11 for radiation transfer with a metal watch shaft 3 is provided in the watch particle 1, a stainless steel antenna 4 is connected to the metal watch shaft 3 in the strap 2, and the stainless steel antenna 4 includes a winding section 5 wound around the metal top and a radiation section 6 arranged along the length direction of the strap 2.

[0033] In order to meet different usage needs, the watch strap can be assembled in two ways: detachable and non-detachable.

[0034] In one of the embodiments, the watch strap 2 is detachably connected to the watch particle 1, and the ends of the watch strap 2 are respectively provided with a right striker 7 and a left striker 8, the right striker 7 is electrically connected to the control circuit board, and the left striker 8 is connected to a toggle rod 9, and the end of the watch strap 2 is matched with the toggle rod 9 and has a toggle groove concave therein, and retaining grooves 10 are provided in the ears at both ends of the watch particle 1 for accommodating the left and right strikers of the watch strap 2, and the stainless steel antenna 4 and the metal watch shaft 3 are fixed in the watch strap 2 by silicone mold injection.

[0035] Different from the above embodiment, in this embodiment, the watch strap 2 and the watch particle 1 are integrally formed and cannot be detached. The watch strap 2 is electrically connected to the control circuit board in the watch particle 1 through the metal watch shaft 3. The metal watch shaft 3 includes a right striker 7 and a left striker 8. The right striker 7 of the metal watch shaft 3 in the watch strap 2 is electrically connected to the control circuit board in the watch particle 1 through a metal connector 11. The internal stainless steel antenna 4 and the metal watch shaft 3 are also fixed to the watch strap 2 by silicone mold injection.

[0036] Whether it is a detachable watch strap or a watch strap integrated with the watch core, the volume and shape of the internal injection-molded integrated structure must be smaller than the shape of the watch strap when the watch strap is formed, and ensure that the silicone thickness in all areas of the watch strap is more than 1.5MM to ensure the overall structural strength of the watch strap. The watch strap material is preferred but not limited to silicone, and the diameter of the stainless steel antenna is 0.2-0.8MM due to the spring diameter. The minimum can be 0.2MM. When built into the watch strap, there is almost no force affecting the elasticity of the watch strap itself.

[0037] At the same time, it should be noted during assembly that a metal connector 11 is connected to the left striker 8 inside the watch particle 1, a radio frequency coaxial line 12 is connected between the metal connector 11 and the control circuit board inside the watch particle 1, the metal connector 11 is insulated from the metal shell 13 of the watch particle 1, and the plastic used to insulate the metal connector also plays the role of fixing the metal watch shaft. To ensure that the watch strap can withstand a tensile force of more than 10KG, the plastic thickness must be more than 1MM.

[0038] When used for a detachable watch strap, when the watch strap 2 is detachably connected, the stroke of the right striker 7 and the left striker 8 are both 1.3mm. When the right striker 7 contacts the metal connector 11, the right striker 7 is compressed to 1mm, so that it is in close contact with the metal connector 11 to ensure the connection effect. The only difference between the left striker connection and the right striker is that the metal connector is missing, and the left striker is only required to be insulated from the metal shell after the watch strap is assembled in place.

[0039] In order to meet different usage needs:

[0040] When used as an antenna extension line, the RF coaxial line 12 is connected to the signal output pin of the mainboard through welding or an RF connector to transmit the signal. The grounding end on the RF coaxial line is connected to the metal shell 13 of the meter particle 1. In addition, the grounding method can also be selected from conductive foam or metal adapters and other materials. As long as the coaxial line and the metal shell are fully grounded, the stainless steel antenna 4 uses a stainless steel antenna with a diameter of 0.2-0.8MM. The winding section 5 of the stainless steel antenna is coiled and sleeved with the metal meter shaft 3. After close contact, the metal meter shaft and the antenna are connected as a whole by soldering. The radiation section 6 of the stainless steel antenna is serpentine, straight, arc, or L-shaped. One of them is set along the length direction of the strap 2. This structure can effectively prevent the antenna from being broken under the tension of 10KG of the strap. The length of the stainless steel antenna in the strap 2 is greater than 8cm, thereby ensuring the antenna signal. The spring routing can be designed according to the overall environment to achieve the best performance. Since this antenna is externally located on the outside of the motherboard, the metal shell is used as the antenna reference ground, and the effective length is about 70MM, which is smaller than the ideal 80MM ground. The antenna is completely clear and the available area is greater than 400 square millimeters. Whether it is debugging GPS, Bluetooth, WIFI, NB or 4G full network access, the antenna efficiency can reach about 25%, and the debugging difficulty is small.

[0041] When the watch strap is used as an extended ground, when the watch particle 1 is a non-metallic shell, the stainless steel antenna 4 is the ground wire, the RF coaxial line 12 is also the ground wire, and the winding section 5 of the stainless steel antenna 4 is coiled and sleeved with the metal watch shaft 3, which can be used to enhance the signal of the non-metallic watch antenna. The non-metallic watch antenna has a major constraint, that is, the length of the mainboard ground is generally only about 40MM, which will cause the antenna radiation efficiency below 800-960MHZ to be very low, usually only less than 10%, and the watch strap antenna can increase the antenna efficiency in this frequency range to about 20% after being used as an extended ground.

[0042] Meanwhile, the stainless steel antenna 4 can also be used as a GPS wire. The winding section 5 of the stainless steel antenna 4 is wound around and sleeved with the metal watch shaft 3. The radiation section 6 of the stainless steel antenna 4 is 4-6 cm long in the watch strap 2, preferably 5 cm.

[0043] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0044] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A detachable metal watch strap antenna, Features: The invention comprises a watch particle (1) and a watch band (2) arranged at both ends of the watch particle (1); the watch particle (1) and the watch band (2) are connected integrally or detachably; a metal watch shaft (3) is arranged in the watch band (2); a metal connecting piece (11) for radiation transfer with the metal watch shaft (3) is arranged in the watch particle (1); a stainless steel antenna (4) is arranged in the watch band (2) and connected to the metal watch shaft (3); the stainless steel antenna (4) comprises a winding section (5) wound around the metal watch shaft (3) and a radiation section (6) arranged along the length direction of the watch band (2).

2. A detachable metal watch strap antenna according to claim 1, Features: The watch strap (2) is detachably connected to the watch particle (1); the ends of the watch strap (2) are respectively provided with a right striker (7) and a left striker (8); the right striker (7) is electrically connected to the control circuit board; the left striker (8) is connected to a toggle rod (9); the end of the watch strap (2) is matched with the toggle rod (9) and is concave with an toggle groove; the ears at both ends of the watch particle (1) are provided with retaining grooves (10) for accommodating the left and right strikers of the watch strap (2).

3. A detachable metal watch strap antenna according to claim 1, Features: The watch band (2) and the watch core (1) are integrally formed and cannot be disassembled; the metal watch shaft (3) comprises a right striker (7) and a left striker (8); the watch band (2) is electrically connected to a control circuit board in the watch core (1) via the right striker (7) of the metal watch shaft (3) via a metal connector (11).

4. A detachable metal watch strap antenna according to claim 2 or 3, Features: A radio frequency coaxial line (12) is provided between the metal connector (11) and the control circuit board in the watch particle (1), and the metal connector (11) is insulated from the metal shell (13) of the watch particle (1).

5. A detachable metal watch strap antenna according to claim 4, Features: The grounding end on the radio frequency coaxial line (12) is connected to the metal shell (13) of the watch particle (1); the stainless steel antenna (4) is a stainless steel antenna with a diameter of 0.2-0.8MM; the winding section (5) of the stainless steel antenna is coiled and sleeved with the metal watch shaft (3); the radiation section (6) of the stainless steel antenna is in a snake shape, a straight line shape, an arc shape, or an L shape and is arranged along the length direction of the watch strap (2); and the inner line length of the stainless steel antenna in the watch strap (2) is greater than 8cm.

6. A detachable metal watch strap antenna according to claim 4, Features: The stainless steel antenna (4) is a GPS wire, the winding section (5) of the stainless steel antenna (4) is coiled and sleeved with the metal watch shaft (3), and the radiation section (6) of the stainless steel antenna (4) is 4-6 cm long in the watch strap (2).

7. A detachable metal watch strap antenna according to any one of claims 5-6, Features: The stainless steel antenna (4) and the metal watch shaft (3) are fixed in the watch strap (2) by silicone in-mold injection molding.

8. The detachable metal watch strap antenna according to claim 4, Features: When the watch strap (2) is detachably connected, the strokes of the right striker (7) and the left striker (8) are both 1.3 mm, and when the right striker (7) contacts the metal connector (11), the right striker (7) is compressed to 1 mm.

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