TWI575187B - Lamp tube and end cap structure thereof - Google Patents

Description

Lamp and its end cover structure

The present invention relates to a lamp tube, and more particularly to a lamp tube having a manual switch function and an end cap structure thereof.

In order to meet the design of the lamp holder of the fluorescent lamp, the two ends of the lamp holder are provided with two electrode pins, and the electrode pins are electrically connected to the power socket provided on the lamp holder to form a power supply circuit. To provide the power required for the lamp.

However, when the lamp is attached or detached, the electrode pin on one side of the lamp is electrically connected to the power socket on one side, and the electrode pin on the other side of the lamp is not yet installed in the power socket on the other side. If the user touches the exposed electrode pin on the other side of the lamp by hand, there is a possibility that the current is electrically connected to the ground through the human body to form a circuit, which may cause a user to have an electric shock during installation.

The invention relates to a lamp tube and an end cap structure thereof, which has a manual switch function to ensure the safety of the user during the installation or disassembly of the lamp tube.

According to an aspect of the invention, an end cap structure is provided, including a a first cover, a rotatable body, at least one electrode pin, and a circuit board. The rotatable body is disposed on the first cover. At least one electrode pin is disposed on the first cover for receiving an external power source. The circuit board is disposed in the first cover body, and the circuit board is provided with at least one contact, and the at least one contact is electrically or electrically isolated from the at least one electrode pin by rotation of the rotatable body.

According to an aspect of the invention, a lamp tube is provided, comprising a tube body, the end cap structure described above, and a second end cap structure. The tubular body has a first end and a second end. The end cap structure described above is disposed on the first end. The second end cap structure is disposed on the second end.

In order to better understand the above and other aspects of the present invention, the preferred embodiments are described below, and in conjunction with the drawings, the detailed description is as follows:

10‧‧‧Power supply loop

100‧‧‧ lamp

101‧‧‧End cap structure (first end cap structure)

102‧‧‧Second end cap structure

103‧‧‧pipe body

104‧‧‧ drive

110‧‧‧First cover

111‧‧‧ end face

112‧‧‧ cylindrical surface

113‧‧‧Ring film

114‧‧‧ accommodating holes

115‧‧‧ Positioning film

116‧‧‧ Groove

120‧‧‧Rotating body

121‧‧‧ positioning slot

122‧‧‧ Slider

123‧‧‧ positioning opening

130‧‧‧electrode pins

131, 132‧‧‧ card ring

140‧‧‧Electrical shrapnel

141‧‧‧Bend

150‧‧‧ boards

151‧‧‧Contacts

152‧‧‧ board

153‧‧‧ pads

154‧‧‧ hole

160‧‧‧Second cover

161‧‧‧Fixed holes

162‧‧‧ side wall

170‧‧‧ Signal wire

200‧‧‧External power supply

W‧‧‧Width size

L1, L2‧‧‧ length dimensions

PW1‧‧‧First power cord

PW2‧‧‧second power cord

PW3‧‧‧ internal lines

SW‧‧ switch

FIG. 1 is a schematic view showing the structure of an end cap of a lamp tube according to an embodiment of the invention.

2A and 2B are respectively assembled diagrams showing the structure of the end cap structure of Fig. 1.

Fig. 3A is a schematic view showing the internal structure of the end cap structure of Fig. 2A.

FIG. 3B is a schematic diagram showing the internal structure of the end cap structure of FIG. 2B.

4A and 4B are circuit diagrams showing a lamp tube and a power supply circuit thereof according to an embodiment of the invention.

The embodiments are described in detail below, and the embodiments are only intended to be illustrative and not intended to limit the scope of the invention. Same component The numbers indicate the same or similar components.

Please refer to FIG. 1 , which is a schematic diagram of an end cap structure 101 of a lamp tube according to an embodiment of the invention. The end cap structure 101 includes a first cover 110, a rotatable body 120, two electrode pins 130, two conductive elastic sheets 140, a circuit board 150, a second cover 160, and two signal wires 170. The first cover 110 includes an end surface 111, a cylindrical curved surface 112, and an annular piece 113. The end surface 111 has two receiving holes 114 for receiving the two-electrode pins 130 so that the two-electrode pins 130 protrude beyond the end surface 111. The inner diameter of the two receiving holes 114 is substantially equal to or slightly larger than the outer diameter of the columnar two-electrode pins 130, so that the two-electrode pins 130 pass through the two receiving holes 114, respectively. In addition, in order to fix the two-electrode pin 130 in the two accommodating holes 114, the outer surface of each of the electrode pins 130 and the inner surface of the corresponding accommodating hole 114 are provided with a structure that is engaged with each other (for example, the snap ring 131 or The card slot) is such that the two-electrode pin 130 is tightly fixed to the end face 111.

As shown in FIG. 1, the cylindrical curved surface 112 is integrally connected between the end surface 111 and the annular piece 113. The outer diameter of the cylindrical curved surface 112 is slightly smaller than the outer diameter of the annular piece 113 to form a stepped projection surface between the cylindrical curved surface 112 and the annular piece 113. In addition, two positioning pieces 115 are disposed under the annular piece 113, and the two positioning pieces 115 and the annular piece 113 are separated by a predetermined gap. In addition, the lower portion of the rotatable body 120 is provided with two positioning slots 121 for receiving the two positioning tabs 115. Therefore, when the two positioning pieces 115 are respectively inserted into the two positioning grooves 121, the two positioning pieces 115 support the rotatable body 120, and the rotatable body 120 can rotate corresponding to the annular piece 113.

In the above embodiment, although the outer diameter of the cylindrical curved surface 112 is slightly smaller than the outer diameter of the annular piece 113, the present invention is not limited thereto, and another embodiment The outer diameter of the cylindrical curved surface 112 may be slightly larger than the outer diameter of the annular piece 113 to form a stepped concave surface between the cylindrical curved surface 112 and the annular piece 113. When the annular piece 113 of the smaller outer diameter is used, the rotatable body 120 does not need to be positioned by the above-mentioned two positioning pieces 115, but is directly disposed on the outer surface of the annular piece 113, and is appropriately slid. The design allows the rotatable body 120 to rotate relative to the annular sheet 113. Therefore, the rotatable body 120 positioned by the two positioning pieces 115 in the first figure of the present invention is only one embodiment of the present invention, and is not intended to limit the present invention.

The function of the rotatable body 120 is the same switch (see the switch SW of FIG. 4B), and the user can manually switch the power source. Referring to FIG. 1 , the annular piece 113 includes a recess 116. The rotatable body 120 includes a slider 122. The slider 122 is received in the recess 116, and the slider 122 can be applied to the user and slide. The block 122 moves in the groove 116 in a sliding direction (the length direction of the groove 116) as shown in Figs. 2A and 2B.

Please refer to FIGS. 2A and 2B , which respectively show the assembly diagram of the end cap structure 101 of FIG. 1 . The difference between the 2A and 2B drawings is that the positions of the sliders 122 are different. As described above, the first cover 110 includes an annular piece 113, and the rotatable body 120 is disposed on the annular piece 113 along a sliding direction. In addition, the end cap structure 101 can further include a second cover 160 that is combined with the first cover 110 and fixed to the first cover 110. In one embodiment, the annular piece 113 is disposed on one side of the first cover 110 and is fixed between the first cover 110 and the second cover 160. In another embodiment, the annular piece 113 is disposed on an opposite side of the second cover 160 facing the first cover 110 and is fixed between the first cover 110 and the second cover 160. The annular sheet 113 used in the first embodiment of the present invention is only one of the embodiments, and is not intended to limit the present invention.

The rotatable body 120 is disposed between the first cover 110 and the second cover 160 and exposes the slider 122 in the recess 116 of the annular piece 113. When the second cover 160 is combined with the first cover 110 and fixed on the first cover 110, one side of the original recess 116 is an open side, but is closed by one side wall 162 of the second cover 160 to form a After closing the side, it becomes a closed groove 116.

The width dimension W of the slider 122 is substantially the same as the width dimension W of the closed groove 116, but the length dimension L1 of the slider 122 is smaller than the length dimension L2 of the closed groove 116 or about the closed groove 116. The length dimension L2 is 1/2 to 1/3 so that the slider 122 is apparently slid from one end of the closed groove 116 (see Fig. 2A) to the other end (see Fig. 2B).

The second cover body 160 can be an annular body having two fixing holes 161, and the second cover body 160 can be locked to the first through the two fixing holes 161 by a fastener such as a screw (not shown). On the cover 110. In an embodiment, the second cover 160 is, for example, a single component, and is separately assembled on the first cover 110, and the first cover 110 can be assembled at the end of the tube of the tube by the second cover 160. Above, the lamp tube 100 as shown in Fig. 4A. In another embodiment, the second cover 160 is, for example, one end of the tube of the tube, and the first cover 110 can be directly assembled on the end of the tube by the second cover 160. Therefore, the use of the independently assembled second cover 160 in the first embodiment of the present invention is only one embodiment of the present invention and is not intended to limit the present invention.

Referring to FIG. 2A, when the slider 122 of the rotatable body 120 is located at one end of the closed recess 116, the power source is switched to an off state, at which time the external power source cannot be powered via the two-electrode pin 130. Referring to FIG. 2B, when the slider 122 of the rotatable body 120 is located at the other end of the closed recess 116, the power source is switched to an on state. At this time, the external power source can be connected via the two electrodes. The foot 130 is powered. Therefore, the end cap structure 101 of the present embodiment has the function of manually switching the switch to turn the power on or off.

Please refer to FIGS. 3A and 3B , wherein FIG. 3A illustrates an internal schematic view of the end cap structure 101 of FIG. 2A, and FIG. 3B illustrates an internal schematic view of the end cap structure 101 of FIG. 2B. In FIG. 3A, the rotatable body 120 of FIG. 1 is assembled with the circuit board 150, and at least one contact 151 is disposed on the circuit board 150. When the number of the electrode pins 130 is one, as long as a corresponding one of the contacts 151 is in contact with or not in contact with the electrode pins 130, however, when the number of the electrode pins 130 is two, as long as there is a corresponding one The contact 151 or more than one contact 151 may be used, and there is no need to have two contacts 151. The two contacts 151 are provided to ensure that the at least one electrode pin 130 and the at least one contact 151 are electrically connected to each other.

In addition, one end of the two signal wires 170 can be electrically connected to the circuit board 150 through the two pads 153, and the other end of the two signal wires 170 is connected to a driver 104 to provide power to the driver 104. As shown in FIG. 4A, the driver 104 is disposed in the tube of the lamp tube for driving a light-emitting element such as a light-emitting diode unit or the like.

In FIG. 3A, the circuit board 150 can electrically isolate at least one of the contacts 151 from the at least one electrode pin 130 by the rotation of the rotatable body 120 to switch the power source to a closed state. In addition, in FIG. 3B, the circuit board 150 can electrically connect at least one contact 151 to the at least one electrode pin 130 by the rotation of the rotatable body 120, so that the power source is switched to an open state.

In one embodiment, the rotatable body 120 includes, for example, a locating opening 123, and the circuit board 150 includes a plate 152, as shown in FIG. The plate body 152 extends toward the positioning opening 123 and is fitted into the positioning opening 123 to assemble the rotatable body 120 with the circuit board 150 as shown in FIG. 3A. But the above positioning is open The position of the port 123 and the plate 152 are interchangeable, that is, in another embodiment, the rotatable body 120 includes a plate 152 and the circuit board 150 includes a positioning opening 123. The plate body 152 extends toward the positioning opening 123 and is fitted into the positioning opening 123 to assemble the rotatable body 120 with the circuit board 150. The structure in which the positioning opening 123 and the plate body 152 are fitted to each other may be replaced by other similar snapping or locking structures, which is not limited in the present invention.

In addition, at least one conductive elastic piece 140 may be further disposed between the circuit board 150 and the at least one electrode pin 130. When the number of the electrode pins 130 is one, as long as a corresponding one of the conductive elastic pieces 140 is in contact with the electrode pin 130, however, when the number of the electrode pins 130 is two, two conductive elastic pieces 140 are respectively provided. It is in contact with the two electrode pins 130. In FIG. 3A, one end of the two conductive elastic pieces 140 is fixedly connected to the snap ring 132 of the corresponding two-electrode pin 130, and the other end extends to the circuit board 150 and forms a curved portion 141. The circuit board 150 is pressed. In FIG. 3A, the two conductive elastic pieces 140 are not in contact with the two contacts 151, so that the power source is switched to a closed state. In addition, in FIG. 3B, the circuit board 150 can be rotated by the rotation of the rotatable body 120, and the two conductive elastic pieces 140 are brought into contact with the two contacts 151, so that the power source is switched to an open state.

A hole 154 is defined in the center of the circuit board 150. The hole 154 allows a shaft member (not shown) to pass through and be positioned at a central position of the first cover 110 so that the circuit board 150 is supported by the shaft member. The first cover 110 is fixed on the first cover 110, and the circuit board 150 is also rotatable relative to the shaft for use as a power source for switching.

Although the above-described embodiment drives the circuit board 150 to rotate by the rotatable body 120, the position of the contact 151 of the circuit board 150 is displaced. However, in another embodiment, when the first cover 110 itself has a rotatable function, it may also be taken. The rotatable body 120 is replaced by the above. The difference is that the circuit board 150 at this time does not need to be driven, but is fixed on the second cover body 160. When the first cover body 110 rotates, the electrode pin 130 and the conductive elastic piece 140 are replaced by the first cover body 110. The displacement is generated and the two conductive elastic sheets 140 are in contact with or not in contact with the two contacts 151, and the power supply can be switched.

Please refer to FIGS. 4A and 4B , which are circuit diagrams of the lamp tube 100 and its power supply circuit 10 according to an embodiment of the invention. The lamp tube 100 includes a tube body 103, a first end cap structure 101, and a second end cap structure 102. The first end cap structure 101 is an end cap structure with a manual switch function introduced in the above embodiment, and is disposed at the first end of the tubular body 103, and the second end cap structure 102 is disposed at the second end of the tubular body 103. , but does not have the function of manual switch. The electrode pin 130 of the first end cover structure 101 is electrically connected to one of the first power lines PW1 of the power supply circuit 10, and the electrode pin 130 of the second end cover structure 102 is electrically connected to the second power line PW2 of the power supply circuit 10. The electrical connection is used to provide the external power source 200 required for the lamp 100, such as an alternating current power source or a direct current power source.

As shown in FIG. 4A, the power supply circuit 10 is, for example, an AC circuit that is powered by both ends of the lamp tube 100. When the internal line PW3 of the lamp tube 100 is electrically connected to the second power line PW2 by manually switching the switch SW, the driver 104 receives the external power source 200 and is driven by current to turn on [d1] to make the tube 100 is conducted in the power supply circuit 10. In addition, in FIG. 4B, when the internal line PW3 of the lamp tube 100 is electrically isolated from the second power line PW2 by manually switching the switch SW, the driver 104 is cut off from the external power source 200 and cannot receive the external power source 200. The lamp tube 100 is not turned into the power supply circuit 10.

It can be seen from the above description that the lamp disclosed in the above embodiment of the present invention The tube and its lamp cover structure are manually switched to the closed state to avoid the risk of electric shock when the user touches the exposed electrode pins during lamp installation or disassembly. After the lamp is installed, the switch is switched to the on state to receive the external power supply to ensure the safety of the user during the installation or removal of the lamp.

In conclusion, the present invention has been disclosed in the above preferred embodiments, and is not intended to limit the present invention. A person skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

101‧‧‧End cap structure

110‧‧‧First cover

111‧‧‧ end face

112‧‧‧ cylindrical surface

113‧‧‧Ring film

114‧‧‧ accommodating holes

115‧‧‧ Positioning film

116‧‧‧ Groove

120‧‧‧Rotating body

121‧‧‧ positioning slot

122‧‧‧ Slider

123‧‧‧ positioning opening

130‧‧‧electrode pins

131, 132‧‧‧ card ring

140‧‧‧Electrical shrapnel

141‧‧‧Bend

150‧‧‧ boards

151‧‧‧Contacts

152‧‧‧ board

153‧‧‧ pads

154‧‧‧ hole

160‧‧‧Second cover

161‧‧‧Fixed holes

170‧‧‧ Signal wire

Claims (8)

An end cap structure of a lamp tube, the end cap structure comprising: a first cover body; a rotatable body disposed on the first cover body; at least one electrode pin disposed on the first cover body, the At least one electrode pin for receiving an external power source; and a circuit board disposed in the first cover body, the circuit board is provided with at least one contact, the at least one contact being rotated by the rotatable body The at least one electrode is electrically or electrically isolated, wherein one of the rotatable body and the circuit board includes a positioning opening, and the other of the rotatable body and the circuit board includes a board. The plate body extends toward the positioning opening and is fitted into the positioning opening. The end cap structure of claim 1, wherein the first cover body comprises an annular piece, and the rotatable body is disposed on the annular piece along a sliding direction. The end cap structure of claim 2, further comprising a second cover disposed on one side of the first cover or on an opposite side of the second cover and fixed Between the first cover and the second cover. The end cap structure of claim 2, wherein the annular piece comprises a groove, the rotatable body comprises a slider, the slider is received in the groove, and the slider The length dimension in the sliding direction is smaller than the length dimension of the groove. The end cap structure of claim 1, further comprising at least one conductive elastic piece, one end of the at least one conductive elastic piece being fixedly connected to the at least one electrode pin, The other end extends to the circuit board and is in contact with or not in contact with the at least one contact. A lamp tube comprising: a tube body having a first end portion and a second end portion; an end cap structure according to any one of claims 1 to 5, disposed at the first end And a second end cap structure disposed on the second end. The lamp of the sixth aspect of the invention, wherein the two ends of the lamp are connected to a power supply circuit, and when the at least one contact is electrically connected to the at least one electrode, the lamp is electrically connected to the power supply. The circuit is configured to receive the external power source, and when the at least one contact is electrically isolated from the at least one electrode pin, the lamp tube is not turned into the power supply circuit to cut off the external power source. The lamp tube of claim 6, wherein the power supply circuit is an alternating current circuit that is powered by both ends of the lamp tube.