CN206739062U - A kind of telescopic blackboard lights - Google Patents

Abstract

The utility model relates to a telescopic blackboard lamp, which comprises a rotating rod, a driving device, a fixed rail, a lamp, and a control switch. Connection, the lamp is connected with the fixed rail, the driving device is fixed on the top of the blackboard, the control switch is fixed on the side of the blackboard, and the control switch controls the opening and closing of the lamp. The advantages are: the overall structure is reasonable, easy to use, the blackboard lamp is fixed on the top of the blackboard, and can be expanded and contracted according to needs, without affecting the use of the projection screen, and can obtain a good lighting effect on the blackboard surface. The driving device is used to drive the two rotating rods to rotate in reverse, so as to realize the expansion and contraction of the fixed rail, and then adjust the illumination range of the lamp. When it is fully retracted, the use of the projection screen will not be affected.

Description

A retractable blackboard lamp

technical field

The utility model relates to a lamp, in particular to a retractable blackboard lamp.

Background technique

In order to provide a comfortable, efficient and healthy light environment for people's life, work and study, my country's architectural lighting design standards have been greatly improved. Teenagers are the future of the country, and their health should be paid close attention to. However, in recent years, the incidence of myopia among teenagers in my country has been on the rise, from No. 4 in the world in 1998 to No. 2 in the world at present. There are many reasons for students' myopia, among which poor lighting quality is one of the factors causing students' myopia. According to the survey, the poor lighting quality of classrooms is mainly caused by low illumination of desktops and blackboards, insufficient uniformity of illumination, flickering lights, glare and other reasons. The illuminance and blackboard illuminance have been increased to 300lx and 500lx respectively, which is of great significance to improving the classroom light environment and promoting the visual health of young people. However, in real life, the lighting of the blackboard surface that requires the highest illumination in the classroom is not satisfactory. For example, some blackboard lights are fixed on the ceiling in front of the blackboard, but the place with the highest illumination is not on the blackboard. Although some blackboard lights It can make the highest illuminance on the blackboard, but the illuminance uniformity of the entire blackboard surface is too poor. Some blackboard lamps can concentrate and evenly project the light emitted on the blackboard surface. This kind of blackboard lamp is used when using a fixed blackboard. A better lighting effect can be obtained, but for the blackboard that slides up and down, this kind of blackboard light fixed on the ceiling or wall cannot project the emitted light onto the blackboard with the highest efficiency, which not only affects the classroom light environment, but also affects the young people. It is detrimental to the health of the human body, and it also causes a waste of energy. If this kind of blackboard light is installed on the blackboard and slides up and down with the blackboard, you can get a good lighting effect on the blackboard surface. However, installing the blackboard light on the blackboard requires a certain distance beyond the blackboard surface, which will affect the use of the projection screen. Projectors are now almost standard equipment in classrooms, so this efficient blackboard light is not suitable for classrooms that use projectors.

Contents of the invention

In order to overcome the deficiencies of the prior art, the purpose of this utility model is to provide a telescopic blackboard lamp, which does not affect the normal use of projection equipment and provides good lighting for the blackboard.

In order to achieve the above object, the utility model is realized through the following technical solutions:

A telescopic blackboard lamp, including a rotating rod, a driving device, a fixed rail, a lamp, and a control switch. The fixed rail is connected, the driving device is fixed on the top of the blackboard, the control switch is fixed on the side of the blackboard, and the control switch controls the opening and closing of the lamps.

The driving device includes two stepping motors, and the output ends of the stepping motors are connected with the rotating rod.

The driving device includes a motor, a gear 1 and a gear 2, the motor drives the gear 1, the gear 1 and the gear 2 mesh with each other, and the gear 1 and the gear 2 are respectively fixedly connected with two rotating rods.

A limiting platform is provided at one end of the rotating rod, and grooves matching the limiting platform are provided on both sides of the chute.

One end of the rotating rod is provided with a pulley.

Compared with the prior art, the beneficial effects of the utility model are:

The telescopic blackboard light has a reasonable overall structure and is easy to use. The blackboard light is fixed on the top of the blackboard and can be stretched according to needs, without affecting the use of the projection screen, and can obtain a good lighting effect on the blackboard surface. The driving device is used to drive the two rotating rods to rotate in reverse, so as to realize the expansion and contraction of the fixed rail, and then adjust the illumination range of the lamp, and when it is fully retracted, the use of the projection screen will not be affected.

Description of drawings

Fig. 1 is a structural schematic diagram one of the utility model.

Fig. 2 is the second structural diagram of the utility model.

Fig. 3 is a side view of the utility model.

Fig. 4 is a top view one when the utility model is stretched out.

Fig. 5 is a plan view 1 when the utility model is retracted.

Fig. 6 is the second plan view when the utility model is stretched out.

Fig. 7 is the top view II when the utility model is retracted.

Fig. 8 is a structural schematic diagram of the driving device.

Fig. 9 is the first front view of the rotating rod.

Fig. 10 is a side view one of the rotating rod.

Figure 11 is the second front view of the rotating rod.

Fig. 12 is the second side view of the rotating rod.

Fig. 13 is a sectional view of the fixed rail.

In the figure: 1-blackboard 2-driving device 3-rotating rod 4-fixed rail 5-lamps and lanterns 6-control switch 7-chute 8-limiting platform 9-pulley 10-groove 11-motor 12-gear one 13- Gear two 14-fixed rod 15-housing.

detailed description

The utility model is described in detail below in conjunction with the accompanying drawings, but it should be pointed out that the implementation of the utility model is not limited to the following embodiments.

See Fig. 1-Fig. 7, a kind of telescopic blackboard lamp, comprises rotating rod 3, driving device 2, fixed rail 4, lamps and lanterns 5, control switch 6, is provided with two chute 7 on fixed rail 4, and one end of rotating rod 3 Slidingly connected with the chute 7, the other end is connected with the driving device 2, the lamp 5 is connected with the fixed rail 4, the driving device 2 is fixed on the top of the blackboard 1, the control switch 6 is fixed on the side of the blackboard 1, and the control switch 6 controls the lamp 5 On and off, see Figure 3. The switch for controlling the driving device 2 can also be arranged on the side of the blackboard 1 . The light fixture 5 and the fixed rail 4 can be flexibly hinged to realize the adjustment of the lighting angle.

As shown in Figure 1, the driving device 2 includes two stepping motors, the output ends of the stepping motors are connected to the rotating rod 3, and the two stepping motors drive the rotating rod 3 to rotate in reverse to realize the extension or retraction of the lamp 5 , a pair of driving devices 2 control the extension or retraction of a lamp 5, see Figure 4, Figure 5.

See Fig. 2, Fig. 8, drive device 2 comprises motor 11, gear one 12, gear two 13, motor 11 drives gear one 12, gear one 12 and gear two 13 mesh with each other, gear one 12, gear two 13 respectively with two Turning bar 3 is fixedly connected, and motor 11 drives turning bar 3 to rotate while driving gear one 12 to rotate, and gear one 12 meshes with gear two 13 and rotates reversely, realizes two turning bars 3 reverse rotations. During specific production, the driving device 2 can be fixed in the housing 15, a rotating rod 3 is fixedly connected with the output shaft of the motor 11, the gear one 12 is fixedly connected with the rotating rod 3, the bottom of the gear two 13 is supported and fixed by the fixed rod 14, Fixed rod 14 is connected with gear two 13 by bearing, and another rotating rod 3 is fixedly connected with gear two 13.

11-13, one end of the rotating rod 3 is provided with a limiting platform 8, and both sides of the chute 7 are provided with grooves 10 matching the limiting platform 8, so as to prevent the rotating rod 3 from detaching from the fixed rail 4 during movement.

See Fig. 9, Fig. 10, one end of the rotating rod 3 is provided with a pulley 9, and the pulley 9 is arranged in the chute 7.

The telescopic blackboard lamp is installed on the upper edge of the slidable blackboard 1, and can slide up and down with the blackboard 1, and can be extended or retracted freely according to needs, which does not affect the use of the projection screen and can obtain a good lighting effect on the blackboard 1 side , At the same time, it is conducive to the realization of lighting energy saving. The lamps 5 are fixed on the fixed rail 4 at the most suitable angle, so as to obtain the best contrast without causing glare.

See Figure 1 and Figure 2. According to needs, a blackboard 1 can be equipped with 2 to 4 retractable blackboard lights. When not in use for projection, the projection screen is put away, and the lamps 5 are all stretched out. When needed, they can all be opened to illuminate the blackboard 1; When only using projection or when other teaching aids need to be hung above the blackboard 1, all the blackboard lights can be retracted; when both projection and blackboard 1 are used in class, the blackboard lights corresponding to the projection screen can be retracted, and other blackboard lights Stretch out to illuminate the blackboard 1, so that viewing the projection and viewing the blackboard 1 will not affect each other.

Advantage of the utility model:

1) The lighting effect is good. No matter where the blackboard 1 is, the light emitted by the blackboard lamp can be almost completely and evenly projected on the blackboard 1, so that the illuminance is not lower than 500 lx, and the uniformity of illuminance is not lower than 0.7. Students do not suffer from glare.

2) The use efficiency of the lamp 5 is high, because the lamp 5 can slide up and down with the blackboard 1, so that the original use efficiency of the blackboard lamp can be maintained all the time, basically no light reaches the places other than the blackboard 1, and a part can be extended as needed The blackboard lamp and a part of the blackboard lamp are retracted, so that the light emitted by the retractable blackboard lamp can be utilized with the highest efficiency.

3) Save lighting energy, because the light source of the new high-efficiency blackboard lamp itself and the efficiency of the lamp 5 are very high, and the device of the present invention can make the light emitted by the blackboard lamp almost completely and uniformly projected on the blackboard 1, and use It is convenient and flexible to control, so it is beneficial to save lighting energy.

Claims (5)

1. A kind of 1. telescopic blackboard lights, it is characterised in that including rotating bar, drive device, retaining rail, light fixture, controlling switch, Gu Orbit determination is provided with two chutes, and rotating bar one end is connected with slide, and the other end is connected with drive device, light fixture and retaining rail Connection, drive device are fixed at the top of blackboard, and controlling switch is fixed on the sidepiece of blackboard, the unlatching of controlling switch control light fixture with Close.
2. 2. a kind of telescopic blackboard lights according to claim 1, it is characterised in that described drive device includes two steps Stepper motor, the output end of stepper motor are connected with rotating bar.
3. A kind of 3. telescopic blackboard lights according to claim 1, it is characterised in that described drive device include motor, Gear one, gear two, motor-driven gear one, gear one are intermeshed with gear two, and gear one, gear two turn with two respectively Lever is fixedly connected.
4. 4. a kind of telescopic blackboard lights according to claim 1, it is characterised in that described rotating bar one end is provided with spacing Platform, both sides are provided with the groove to match with limiting stand in chute.
5. 5. a kind of telescopic blackboard lights according to claim 1, it is characterised in that described rotating bar one end, which is provided with, to be slided Wheel.