Abstract:
A seat tilt angle control device includes a tilt unit including a drive mechanism for tilting the tilt unit within a predetermined range and a mounting assembly, a control unit angularly adjustably mounted in the mounting assembly of the tilt unit and including a switch electrically coupled to the drive mechanism and movable between a first angle range where the switch controls the drive mechanism to be movable and a second angle range where the switch controls the drive mechanism to be immovable.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to vehicle technology, and more particularly to a seat tilt angle control device for controlling the tilt angle of the vehicle seat. 
     2. Description of the Related Art 
     Most conventional vehicle seat tilt angle control devices do not allow adjustment of the tilt angle. Some conventional vehicle seat tilt angle control devices that allow adjustment of the tilt angle have the drawbacks of being difficult to control the adjustment angle, and not allowing the user to know the adjustment status. 
     Further, it is necessary to detach many component parts before adjusting a conventional vehicle seat tilt angle control device, causing inconvenience to the user. Further, different models of vehicles have different weight configurations, and must be equipped with different vehicle seat tilt angle control devices of which the component parts cannot be shared, causing problems in production management costs and other aspects. 
     Therefore, conventional vehicle seat tilt angle control devices are still not satisfactory in function. Improvement in this regard is necessary. 
     SUMMARY OF THE INVENTION 
     The present invention has been accomplished under the circumstances in view. The technical concept of the present invention is to provide a seat tilt angle control device, which can be controlled to accurately adjust the tilt angle adjustment range without detaching many component parts, assuring a high level of convenience and safety. 
     To achieve this and other objects of the present invention, a seat tilt angle control device of the invention comprises a tilt unit comprising a drive mechanism for tilting the tilt unit within a predetermined angle and a mounting assembly, a control unit angularly adjustably mounted in the mounting assembly and comprising a switch electrically coupled to the drive mechanism and movable between a first angle range where the switch controls the drive mechanism to be movable and second angle range where the switch controls the drive mechanism not to be moved. 
     By means of the control unit, the seat tilt angle control device can be conveniently adjustably mounted in the tilt unit, facilitating adjustment of the tilt angle adjustment range. 
     Other advantages and features of the present invention will be fully understood by reference to the following specification in conjunction with the accompanying drawings, in which like reference signs denote like components of structure. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWING 
         FIG. 1  is an oblique top elevational view of a seat tilt angle control device in accordance with the present invention. 
         FIG. 2  is an exploded view of the seat tilt angle control device in accordance with the present invention. 
         FIG. 3  corresponds to  FIG. 1  when viewed from another angle. 
         FIG. 4  corresponds to  FIG. 3 , illustrating the tilt angle adjusted. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Prior to reading the specification, it is to be noted that the directional adjectives of inner, outer, upper and lower through the whole specification are based on the direction of the annexed drawings. 
     Referring to  FIGS. 1-3 , a seat tilt angle control device in accordance with the present invention is shown. The seat tilt angle control device comprises: 
     a tilt unit  1  mounted in a seat back of a vehicle seat, comprising a tilt support frame set  10 ; 
     a drive mechanism  20  adapted for tilting the tilt unit  1  within a predetermined angle, comprising a motor  21 , a linking member  22  and a connection member  23 ; 
     a mounting assembly  30  mounted in the drive mechanism  20 , comprising a connection member  31  capped on the connection member  23  of the drive mechanism  20 , a plurality of mounting through holes  32  cut through the connection member  31 , a plurality of screw bolts B 1  mounted in the mounting through holes  32  to affix the connection member  31  to the connection member  23  of the drive mechanism  20 , an opening  33  cut through the connection member  31 , a plurality of adjustment holes  34  cut through the connection member  31  and equiangularly spaced around the opening  33 , and an indicator  35 ; 
     a control unit  4  angularly adjustably mounted in the tilt unit  1 , comprising an adjustment member  50  for adjusting the mounting assembly  30  at the tilt unit  1 ; 
     a switch mount  60  connected to the adjustment member  50 ; and a switch  70  mounted in the switch mount  60  and electrically coupled to the drive mechanism  20 . 
     Further, the adjustment member  50  comprises two connecting hole  51 ; the switch mount  60  comprises two connecting hole  61  respectively connected to the connecting hole  51  of the adjustment member  50  by respective screw bolts B 2 . 
     Further, the control unit  4  comprises at least one, for example, two adjustment holes  52 . These adjustment holes  52  are elongated and smoothly curved slots. Further, screw bolt B 3  are respectively inserted through the adjustment holes of the control unit  4  and adjustably and selectively fastened to the adjustment hole  34  of the mounting assembly  30  to adjustably affix the adjustment member  50  to the of the mounting assembly  30  at the tilt unit  1 . In other words, the adjustment holes  52  of the control unit  4  can be fixedly fastened to the adjustment hole  34  of the mounting assembly  30 . 
     The control unit  4  further comprises an index  53  corresponding to the indicator  35  of the tilt unit  1 . 
     Further, the switch mount  60  is inserted into the opening  33  of the mounting assembly  30 , comprising a switch mounting hole  62 . 
     The switch  70  is mounted in the switch mounting hole  62  of the switch mount  60 . In this embodiment, the switch  70  is a mercury switch. However, mercury switch is not a limitation. 
     When the switch  70  is in a first angle range, it drives on the drive mechanism  20 . When the switch  70  is in a second angle range, it stops the drive mechanism  20  from movement. In this embodiment, the first angle range and the second angle range are divided by the horizontal line. 
     The main features and effects of the present invention are outlined hereinafter: 
     As illustrated in  FIG. 3 , when in the first angle range position, the switch  70  is off and cannot control the drive mechanism  20  from not being moved, and therefore, the tilt unit  1  can be freely tilted. 
     As illustrated in  FIG. 4 , when the tilt unit  1  is maximumly tilted, the switch  70  is shifted into the second angle range and electrically conducted to control the drive mechanism  20  from being moved, thus, the tilt unit  1  is stopped from tilting to prevent rollovers. 
     Thus, when adjusting the tilt angle adjustment range, loosen the screw bolt B 3  from the adjustment hole  52  for allowing micro adjustment of the angular position of the adjustment member  50 . Alternatively, the screw bolt B 3  can be respectively affixed to respective other adjustment holes  34  of the mounting assembly  30  to largely change the angular position of the control unit  4 . 
     Thus, the mounting assembly  30  provides multiple adjustment holes  34  for the mounting of the adjustment holes  52  of the adjustment member  50  in a selective manner. Further, the adjustment holes  52  are elongated and smoothly arched slots for micro adjustment. 
     Further, the indicator  35  of the tilt unit  1  mates with the index  53  of the control unit  4  for visually checking the angle being adjusted. 
     Because the seat tilt angle control device of the invention allows free adjustment of the tilt angle, it is practical for use in any of a variety of different models and types of motor vehicles. Accordingly, the present invention has the advantage of saving component parts. 
     Except the aforesaid embodiment, the seat tilt angle control device of the invention can be variously embodied. 
     For example, except the arrangement of mounting the control unit  4  in the drive mechanism  20 , control unit  4  can also be installed in the tilt support frame set  10 . 
     Or, the switch  70  can be roll ball switch instead of the aforesaid mercury switch. 
     Further, in addition to the application of being used in a seat back, the seat tilt angle control device can also be used in a seat cushion or any other different part of the vehicle seat. 
     One or a combination of multiple of the aforesaid embodiments of the present invention can achieve the objects of the present invention. 
     In conclusion, the seat tilt angle control device of the present invention can be controlled to accurately adjust the tilt angle adjustment range without detaching many component parts, assuring a high level of convenience and safety, and effectively achieving the objects of the present invention. 
     Although particular embodiments of the invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not to be limited except as by the appended claims.